Men and women with history of concussion mend differently, study finds
Concussion treatment needs to be more individualized, authors urge
Female soccer players and soccer players who have had a previous concussion recuperate differently from males or players without a history of concussion, new research released today at the 2008 American Orthopaedic Society for Sports Medicine Annual Meeting at the JW Marriott Orlando Grande Lakes shows. The study found that prior history of concussion and gender account for significant differences in test results following the injury. Because of these differences, the authors urge physicians and coaches to take an individualized approach to treating concussion patients.
"The results of this study suggest that physicians should not be taking a one-size-fits-all approach to treating concussions," said co-author Alexis Chiang Colvin, MD, Sports Medicine Fellow for the Department of Orthopaedics at the University of Pittsburgh Medical Center. "Our study shows that patients with a history of a previous concussion perform worse than patients without a previous history on neurocognitive tests taken after they sustain a concussion. Furthermore, females perform worse than males on post-concussion testing, as well."
The authors chose to examine concussion recovery patterns in soccer players due to the popularity of the sport among both genders. Also, it is a non-helmeted sport with identical rules for all participation levels for both genders. In the United States, there are between 1 and 4 million estimated sports-related concussions each year. The most common causes of concussion in soccer include, head-to-head contact, head contact with other body parts and head-to-ground contact.
A concussion is an injury to the brain that results in temporary loss of normal brain function, usually caused by a blow to the head. Concussions can affect memory, judgment, reflexes, speech, balance and coordination.
The study had 234 soccer players (61 percent female, 39 percent male) ranging in age from 8 to 24 years old, who were given neuropsychological tests that measured attention, memory, processing speed and reaction time after their concussion. The results of the tests were analyzed to see if there were group differences in performance between male and female participants and those with a previous history of concussion.
The study found that females performed significantly worse than males on tests of reaction time. Females were also significantly more symptomatic than males. Additionally, there was a trend, although not significant, towards females testing poorly regarding verbal memory and processing speed when compared to males.
Soccer players with a history of concussion performed significantly worse on verbal memory testing after another concussion, the study found.
"There's a theory that males typically have a stronger neck and torso that can handle forces better," said Dr. Colvin. "But when we accounted for Body Mass Index in this study, we still found a difference between males and females. Therefore, there are differences in recovery between genders that cannot simply be attributed to size difference. More studies are needed to determine the reason for differences in recovery between males and females."
Thursday, July 10, 2008
Tuesday, July 8, 2008
Male cyclists risk sexual problems
Men who take up cycling in an effort to stay fit, do their bit for the environment or avoid spiralling motoring costs, could be harming their health if they don't choose the right bicycle. That's the stark warning from consultant urological surgeon Mr Vinod Nargund from St Bartholomew's and Homerton Hospitals, London, in the urology journal BJU International.
He says that the problems to look out for include genital numbness, erection problems and soreness and skin irritations in the groin area.
Men who cycle a lot can also experience changes to their sperm function, because of the excessive heat generated in the pelvic area. No general link between cycling and male infertility has been established, but it is still recognised as a possible side effect and has been noted in a number of male cyclists.
Regular cyclists also run a higher risk of testicular damage and impaired testicular function.
Mountain bikers run a particular risk, says Mr Nargund, as studies have shown that they exhibit higher levels of scrotal abnormalities than on-road cyclists.
"The bicycle saddle is in direct contact with the perineum and its underlying structures" he explains. "It makes contact just behind the scrotum where the nerves and blood vessels enter the back of the scrotum and penis.
"This area is sensitive, with hair follicles and sweat and sebaceous glands, which are all good breeding grounds for infection.
"Abrasions, chafing, damaged hair follicles and bruising are among the most traumatic cycling injuries. Sweating in this area can also cause soreness and skin problems."
He points out that more than 60 per cent of male cyclists who have taken part in research studies have reported genital numbness.
"Numbness is common because the pressure of the saddle can impair the blood supply to this area and put pressure on the nerves in the penis" says Mr Nargund. "This can also affect the man's ability to get an erection.
"There is a greater incidence of numbness and erectile problems in men who cycle regularly and over longer training distances. That is why it is important to rest intermittently during prolonged and vigorous cycling."
Choosing the right bike is essential, stresses Mr Nargund.
"The male cyclist should know his bicycle well and a proper fit is particularly important for high-performance cycling" he says.
"The level of pedal resistance is also very important, because riding a bike using too much resistance is a major cause of health problems in the groin area.
"Cyclists can also help to ease saddle-related injuries or skin irritations by adjusting the saddle height and fore and aft position.
"Padding in the saddle and shorts are also important if cyclists want to avoid saddle-related problems."
Mr Nargund's comment piece has been published online on the BJU International website in advance of its hard copy publication later this year.
He says that the problems to look out for include genital numbness, erection problems and soreness and skin irritations in the groin area.
Men who cycle a lot can also experience changes to their sperm function, because of the excessive heat generated in the pelvic area. No general link between cycling and male infertility has been established, but it is still recognised as a possible side effect and has been noted in a number of male cyclists.
Regular cyclists also run a higher risk of testicular damage and impaired testicular function.
Mountain bikers run a particular risk, says Mr Nargund, as studies have shown that they exhibit higher levels of scrotal abnormalities than on-road cyclists.
"The bicycle saddle is in direct contact with the perineum and its underlying structures" he explains. "It makes contact just behind the scrotum where the nerves and blood vessels enter the back of the scrotum and penis.
"This area is sensitive, with hair follicles and sweat and sebaceous glands, which are all good breeding grounds for infection.
"Abrasions, chafing, damaged hair follicles and bruising are among the most traumatic cycling injuries. Sweating in this area can also cause soreness and skin problems."
He points out that more than 60 per cent of male cyclists who have taken part in research studies have reported genital numbness.
"Numbness is common because the pressure of the saddle can impair the blood supply to this area and put pressure on the nerves in the penis" says Mr Nargund. "This can also affect the man's ability to get an erection.
"There is a greater incidence of numbness and erectile problems in men who cycle regularly and over longer training distances. That is why it is important to rest intermittently during prolonged and vigorous cycling."
Choosing the right bike is essential, stresses Mr Nargund.
"The male cyclist should know his bicycle well and a proper fit is particularly important for high-performance cycling" he says.
"The level of pedal resistance is also very important, because riding a bike using too much resistance is a major cause of health problems in the groin area.
"Cyclists can also help to ease saddle-related injuries or skin irritations by adjusting the saddle height and fore and aft position.
"Padding in the saddle and shorts are also important if cyclists want to avoid saddle-related problems."
Mr Nargund's comment piece has been published online on the BJU International website in advance of its hard copy publication later this year.
Monday, July 7, 2008
Baseball diamonds: the lefthander's best friend
Baseball diamonds are a left-hander's best friend.That's because the game was designed to make a lefty the "Natural," according to David A. Peters, Ph.D., the McDonnell Douglas Professor of Engineering at Washington University in St. Louis and über baseball fan. Peters is a mechanical engineer who specializes in aircraft and helicopter engineering and has a different approach to viewing America's Favorite Pastime.
First of all, some numbers.
"Ninety percent of the human population is right-handed, but in baseball 25 percent of the players, both pitchers, and hitters, are left-handed," said Peters, a devoted St. Louis Cardinal fan who attended "Stan the Man's" last ball game at Sportsman's Park in 1963. "There is a premium on lefthanders for a number of reasons. For starters, take seeing the ball.
"A right-handed batter facing a right-handed pitcher actually has to pick up the ball visually as it comes from behind his (the batter's) left shoulder. The left-handed batter facing the right-handed pitcher has the ball coming to him, so he has a much clearer view of pitches."
Then, Peters says, consider the batter's box. After a right-hander connects with a ball, his momentum spins him toward the third-base side and he must regroup to take even his first step toward first base. In contrast, the left-hander's momentum carries him directly toward first.
"The left-handed batter has a five-foot advantage over the right-handed batter," says Peters. "And that means the lefty travels the 90 feet to first roughly one-sixth of a second faster than the righty. That translates to more base hits for the left-hander, whether singles or extra base hits because lefties are getting to the bases more quickly."
Even Jim Thome and Jason Giambi?
The left-handed pitcher generally is much more difficult to steal off, as, from his stretch, he peers directly at the runner; the right-hander must look over his shoulder and wheel to first base, giving the runner more of a warning of the pitcher's intent.
Positions advantageous to southpaws are pitching, first base and right field. For the positions, the advantage is the favorable angles lefties get, enabling them to throw the ball more quickly across the diamond to second, third and home. One position a lefty rarely plays is catcher, for the obvious reason that it is difficult for a southpaw catcher to throw over so many right-hand batters.
"It wasn't all that long ago when first basemen were predominantly left-handed and most right fielders were left-handed," Peters says. "That has changed, at least since the late sixties."
There's even a bias toward the lefthander in ballpark design. Right field in most parks (just think of Yankee Stadium and Fenway Park) is usually shorter than left field because of the preponderance of right-handed hitters.
While traditional thinking holds that the right-handed batter has the advantage over the left-handed pitcher, because the breaking ball goes into the batter's power threshold, it's not always the case, says Peters. And it's that familiarity thing again.
"Because only 10 percent of the population is left-handed, kids grow up and mature in baseball seeing a left-hander just 10 percent of the time they bat," he says. "So, it can be hard for both lefties and righties to face a southpaw. It's why some left-handed batters look dreadful matched against a lefty."
Some batters don't like facing southpaws because their ball is purported to have a natural movement away from a right-hander and into a lefty.
"There's no scientific evidence to support this, but I wonder if lefties get that movement from learning to write in a right-hander's world," Peters says.
First of all, some numbers.
"Ninety percent of the human population is right-handed, but in baseball 25 percent of the players, both pitchers, and hitters, are left-handed," said Peters, a devoted St. Louis Cardinal fan who attended "Stan the Man's" last ball game at Sportsman's Park in 1963. "There is a premium on lefthanders for a number of reasons. For starters, take seeing the ball.
"A right-handed batter facing a right-handed pitcher actually has to pick up the ball visually as it comes from behind his (the batter's) left shoulder. The left-handed batter facing the right-handed pitcher has the ball coming to him, so he has a much clearer view of pitches."
Then, Peters says, consider the batter's box. After a right-hander connects with a ball, his momentum spins him toward the third-base side and he must regroup to take even his first step toward first base. In contrast, the left-hander's momentum carries him directly toward first.
"The left-handed batter has a five-foot advantage over the right-handed batter," says Peters. "And that means the lefty travels the 90 feet to first roughly one-sixth of a second faster than the righty. That translates to more base hits for the left-hander, whether singles or extra base hits because lefties are getting to the bases more quickly."
Even Jim Thome and Jason Giambi?
The left-handed pitcher generally is much more difficult to steal off, as, from his stretch, he peers directly at the runner; the right-hander must look over his shoulder and wheel to first base, giving the runner more of a warning of the pitcher's intent.
Positions advantageous to southpaws are pitching, first base and right field. For the positions, the advantage is the favorable angles lefties get, enabling them to throw the ball more quickly across the diamond to second, third and home. One position a lefty rarely plays is catcher, for the obvious reason that it is difficult for a southpaw catcher to throw over so many right-hand batters.
"It wasn't all that long ago when first basemen were predominantly left-handed and most right fielders were left-handed," Peters says. "That has changed, at least since the late sixties."
There's even a bias toward the lefthander in ballpark design. Right field in most parks (just think of Yankee Stadium and Fenway Park) is usually shorter than left field because of the preponderance of right-handed hitters.
While traditional thinking holds that the right-handed batter has the advantage over the left-handed pitcher, because the breaking ball goes into the batter's power threshold, it's not always the case, says Peters. And it's that familiarity thing again.
"Because only 10 percent of the population is left-handed, kids grow up and mature in baseball seeing a left-hander just 10 percent of the time they bat," he says. "So, it can be hard for both lefties and righties to face a southpaw. It's why some left-handed batters look dreadful matched against a lefty."
Some batters don't like facing southpaws because their ball is purported to have a natural movement away from a right-hander and into a lefty.
"There's no scientific evidence to support this, but I wonder if lefties get that movement from learning to write in a right-hander's world," Peters says.
Wednesday, June 18, 2008
Sprinters closest to starter pistol have advantage
Researchers at the University of Alberta in Edmonton studying the connection between loud sounds and reaction time are reporting findings that may have sprinters thinking twice about lane assignments at the upcoming Olympics.
Led by Dave Collins, professor of physical education and recreation, and student Alex Brown, researchers hypothesized that the loud starter's pistol at the Olympic Games would allow racers closer to the starter to react sooner and stronger than runners farther away. By analyzing RT for the 100/110m athletics events at the 2004 Olympics sorted by lane number, they found that runners closest to the starter had significantly lower RT than those further away.
"Whether you're a competitive athlete or just a pedestrian trying to cross a busy street, reaction time can be critical," said Collins. "Past research has shown loud sounds can decrease RT and increase force generated during voluntary contractions, and when those sounds evoke a startle response, RT is decreased even further, which is a good thing."
Collins and Brown, along with Brian Maraj and Zoltan Kenwell, both of the Faculty of Physical Education and Recreation, had four trained sprinters and 12 untrained participants perform sprint starts from starting blocks modified to measure horizontal force. Using a recorded gunshot as the ''go'' signal, they randomly presented the signal to test subjects at various decibel levels, from a low of 80 dB to a high of 120 dB. The louder the gunshot, the faster the reaction time of the test subjects.
"In sprint events, where hundredths of a second can make the difference between a gold medal and a silver, minimizing reaction time can be the key to an athlete's success. We suggest that procedures presently used to start the Olympic sprint events give runners closer to the starter the advantage of hearing the "go" signal louder; consequently, they react sooner than their competitors," said Brown.
The applications of this research, published in the June 2008 issue of Medicine & Science in Sports & Exercise, could go beyond competitive athletics. "Our findings might also be helpful for research in Parkinson's disease," said Collins. "People suffering from Parkinson's typically experience episodes of 'freezing', where they want to move but cannot because of impaired processing in certain parts of the brain.
"By introducing a loud sound during a freezing episode we might be able to startle patients into moving as we know that faster reaction times induced by a startle response are due in part to bypassing the cortical circuits that are damaged in Parkinson's disease."
Led by Dave Collins, professor of physical education and recreation, and student Alex Brown, researchers hypothesized that the loud starter's pistol at the Olympic Games would allow racers closer to the starter to react sooner and stronger than runners farther away. By analyzing RT for the 100/110m athletics events at the 2004 Olympics sorted by lane number, they found that runners closest to the starter had significantly lower RT than those further away.
"Whether you're a competitive athlete or just a pedestrian trying to cross a busy street, reaction time can be critical," said Collins. "Past research has shown loud sounds can decrease RT and increase force generated during voluntary contractions, and when those sounds evoke a startle response, RT is decreased even further, which is a good thing."
Collins and Brown, along with Brian Maraj and Zoltan Kenwell, both of the Faculty of Physical Education and Recreation, had four trained sprinters and 12 untrained participants perform sprint starts from starting blocks modified to measure horizontal force. Using a recorded gunshot as the ''go'' signal, they randomly presented the signal to test subjects at various decibel levels, from a low of 80 dB to a high of 120 dB. The louder the gunshot, the faster the reaction time of the test subjects.
"In sprint events, where hundredths of a second can make the difference between a gold medal and a silver, minimizing reaction time can be the key to an athlete's success. We suggest that procedures presently used to start the Olympic sprint events give runners closer to the starter the advantage of hearing the "go" signal louder; consequently, they react sooner than their competitors," said Brown.
The applications of this research, published in the June 2008 issue of Medicine & Science in Sports & Exercise, could go beyond competitive athletics. "Our findings might also be helpful for research in Parkinson's disease," said Collins. "People suffering from Parkinson's typically experience episodes of 'freezing', where they want to move but cannot because of impaired processing in certain parts of the brain.
"By introducing a loud sound during a freezing episode we might be able to startle patients into moving as we know that faster reaction times induced by a startle response are due in part to bypassing the cortical circuits that are damaged in Parkinson's disease."
Monday, June 2, 2008
Injuries to baseball players becoming more serious
Injuries to high school baseball players becoming more serious
New study calls for increased use of protective equipment to reduce injuries
Although the overall rate of high school baseball-related injuries has decreased within the last 10 years, the severity of injuries that occur has increased, according to a new study conducted by researchers at the Center for Injury Research and Policy (CIRP) of The Research Institute at Nationwide Children's Hospital. During the two-year study period, an estimated 132,000 high school baseball-related injuries occurred with an injury rate of more than one per 1,000 athletic exposures.
Potential explanations for the increase in the severity of these injuries are attributed to the increase of intensity during competition and the size and strength of players resulting in them throwing faster, hitting harder and generating more force during player-to-player contact. The fact many high school baseball players now participate in baseball year round also likely contributes to overuse injuries.
"Based on our findings regarding the risk of sustaining an injury when hit by a batted ball, we strongly recommend helmets with face shields or at least mouth guards and eye protection be used by all pitchers, infielders and batters at the high school level," explained the study's lead author Christy Collins, MA, research associate in CIRP of Nationwide Children's Hospital.
According to the study, published in the June issue of Pediatrics, being hit by a batted ball is one of the more common mechanisms of baseball-related injuries and one of the most serious. More than half of the injuries that occurred as a result of being hit by a batted ball were to the head/face and teeth and 40 percent resulted in fractures, lacerations or concussions. When compared to other injuries, injured players struck by a batted ball were more than twice as likely to require surgery. The study also found pitchers are not the only players at risk. Half of the injuries attributed to being hit by a batted ball were sustained during fielding.
"The use of face guards among batters is becoming more accepted in youth baseball," added study co-author Dawn Comstock, PhD, principal investigator in CIRP of Nationwide Children's and faculty member of The Ohio State University College of Medicine. "However, the use of proven protective equipment such as face shields, mouth guards and eye protection is not yet widely accepted by players and coaches at the high school level. Research shows that wearing such protective equipment reduces the risk of sports-related facial and dental injuries."
New study calls for increased use of protective equipment to reduce injuries
Although the overall rate of high school baseball-related injuries has decreased within the last 10 years, the severity of injuries that occur has increased, according to a new study conducted by researchers at the Center for Injury Research and Policy (CIRP) of The Research Institute at Nationwide Children's Hospital. During the two-year study period, an estimated 132,000 high school baseball-related injuries occurred with an injury rate of more than one per 1,000 athletic exposures.
Potential explanations for the increase in the severity of these injuries are attributed to the increase of intensity during competition and the size and strength of players resulting in them throwing faster, hitting harder and generating more force during player-to-player contact. The fact many high school baseball players now participate in baseball year round also likely contributes to overuse injuries.
"Based on our findings regarding the risk of sustaining an injury when hit by a batted ball, we strongly recommend helmets with face shields or at least mouth guards and eye protection be used by all pitchers, infielders and batters at the high school level," explained the study's lead author Christy Collins, MA, research associate in CIRP of Nationwide Children's Hospital.
According to the study, published in the June issue of Pediatrics, being hit by a batted ball is one of the more common mechanisms of baseball-related injuries and one of the most serious. More than half of the injuries that occurred as a result of being hit by a batted ball were to the head/face and teeth and 40 percent resulted in fractures, lacerations or concussions. When compared to other injuries, injured players struck by a batted ball were more than twice as likely to require surgery. The study also found pitchers are not the only players at risk. Half of the injuries attributed to being hit by a batted ball were sustained during fielding.
"The use of face guards among batters is becoming more accepted in youth baseball," added study co-author Dawn Comstock, PhD, principal investigator in CIRP of Nationwide Children's and faculty member of The Ohio State University College of Medicine. "However, the use of proven protective equipment such as face shields, mouth guards and eye protection is not yet widely accepted by players and coaches at the high school level. Research shows that wearing such protective equipment reduces the risk of sports-related facial and dental injuries."
Monday, March 31, 2008
Romps for American League in 2008
Mathematician foresees romps for Major League Baseball's American League in 2008
NJIT’s indefatigable math professor Bruce Bukiet is once again opining on outcomes for this season’s Major League Baseball teams. His picks are based on a mathematical model he developed in 2000.
Operations Research published Bukiet’s original mathematical model on which his predictions are based. The model computes the probability of a team winning a game against another team with given hitters, bench, starting pitcher, relievers and home field advantage.
His predictions follow, including expected number of wins for each team.
“The New York Yankees, Boston Red Sox, Detroit Tigers and Los Angeles Angels should make the playoffs in the American League (AL) in 2008 with the other teams lagging well behind,” he said.
“The National League (NL) should see much tighter races, with the New York Mets and Atlanta Braves winning the East and the wild card, respectively, while in the Central and West Divisions only the Pittsburgh Pirates and the San Francisco Giants have no real shot of making it to the post-season.” The Yankees and Red Sox should tie for baseball’s best record with 98 wins, with both teams making the post-season, one as AL East winner and the other as the AL wild card team. The next closest team in their division, the Toronto Blue Jays, should wind up 12 games back. In the AL Central Division, the Tigers should win, besting the Cleveland Indians by 9 games, while the Angels should win AL West by 14 games over the Seattle Mariners.
In the National League Central Division, Bukiet’s model calls for the top five teams to be within five wins of each other. With the model’s typical error, any team but the Pittsburgh Pirates (with 71 wins) could eke out the division championship. Bukiet calls for the Milwaukee Brewers to win 84, the Chicago Cubs to win 83, the Cincinnati Reds to win 81, the St. Louis Cardinals to win 80 and the Houston Astros to win 79 games.
In the NL West, the contest should be closer, said Bukiet, whose model has the top four teams within three wins of each other. The Colorado Rockies and San Diego Padres, who had to play a tie-breaker to decide the wild card team in 2007 look like they might have to do it again, playing for the NL West title, both winning 85 games in 2008. The Arizona Diamondbacks should be close behind with 83 wins and the Los Angeles Dodgers can expect 82. Only the San Francisco Giants should lag with 75.
The expected number of wins for each team is:
AL East: Yankees – 98; Red Sox – 98; Blue Jays – 86; Rays – 75; Orioles – 63;
AL Central: Tigers – 96; Indians – 87; White Sox – 79; Twins – 74; Royals 63;
AL West: Angels – 92; Mariners – 78; A’s – 75; Rangers – 70;
NL East: Mets – 92; Braves – 89; Phillies – 84; Nationals – 73; Marlins – 70;
NL Central: Brewers – 84; Cubs – 83; Reds – 81; Cards – 80; Astros – 79; Pirates – 71;
NL West: Rockies – 85; Padres – 85; Diamondbacks – 83; Dodgers – 82; Giants – 75;
"These results give a guide of how teams ought to perform during the season but there are so many unknowns, especially concerning trades, injuries and how rookies will perform that cannot be taken into account,” added Bukiet.
NJIT’s indefatigable math professor Bruce Bukiet is once again opining on outcomes for this season’s Major League Baseball teams. His picks are based on a mathematical model he developed in 2000.
Operations Research published Bukiet’s original mathematical model on which his predictions are based. The model computes the probability of a team winning a game against another team with given hitters, bench, starting pitcher, relievers and home field advantage.
His predictions follow, including expected number of wins for each team.
“The New York Yankees, Boston Red Sox, Detroit Tigers and Los Angeles Angels should make the playoffs in the American League (AL) in 2008 with the other teams lagging well behind,” he said.
“The National League (NL) should see much tighter races, with the New York Mets and Atlanta Braves winning the East and the wild card, respectively, while in the Central and West Divisions only the Pittsburgh Pirates and the San Francisco Giants have no real shot of making it to the post-season.” The Yankees and Red Sox should tie for baseball’s best record with 98 wins, with both teams making the post-season, one as AL East winner and the other as the AL wild card team. The next closest team in their division, the Toronto Blue Jays, should wind up 12 games back. In the AL Central Division, the Tigers should win, besting the Cleveland Indians by 9 games, while the Angels should win AL West by 14 games over the Seattle Mariners.
In the National League Central Division, Bukiet’s model calls for the top five teams to be within five wins of each other. With the model’s typical error, any team but the Pittsburgh Pirates (with 71 wins) could eke out the division championship. Bukiet calls for the Milwaukee Brewers to win 84, the Chicago Cubs to win 83, the Cincinnati Reds to win 81, the St. Louis Cardinals to win 80 and the Houston Astros to win 79 games.
In the NL West, the contest should be closer, said Bukiet, whose model has the top four teams within three wins of each other. The Colorado Rockies and San Diego Padres, who had to play a tie-breaker to decide the wild card team in 2007 look like they might have to do it again, playing for the NL West title, both winning 85 games in 2008. The Arizona Diamondbacks should be close behind with 83 wins and the Los Angeles Dodgers can expect 82. Only the San Francisco Giants should lag with 75.
The expected number of wins for each team is:
AL East: Yankees – 98; Red Sox – 98; Blue Jays – 86; Rays – 75; Orioles – 63;
AL Central: Tigers – 96; Indians – 87; White Sox – 79; Twins – 74; Royals 63;
AL West: Angels – 92; Mariners – 78; A’s – 75; Rangers – 70;
NL East: Mets – 92; Braves – 89; Phillies – 84; Nationals – 73; Marlins – 70;
NL Central: Brewers – 84; Cubs – 83; Reds – 81; Cards – 80; Astros – 79; Pirates – 71;
NL West: Rockies – 85; Padres – 85; Diamondbacks – 83; Dodgers – 82; Giants – 75;
"These results give a guide of how teams ought to perform during the season but there are so many unknowns, especially concerning trades, injuries and how rookies will perform that cannot be taken into account,” added Bukiet.
Friday, March 28, 2008
How Dangerous is Boxing for the Brain?
The “Heidelberg Boxing Study” does not find any clear risks from amateur boxing / Publication in “American Journal of Neuroradiology”
Boxing is possibly less dangerous for the brain than previously feared – at least for amateurs. However, conclusive statements on the level of danger are not yet possible. Whether professional boxers such as Muhammad Ali contracted their later brain conditions – in his case Parkinson’s disease at the age of 40 – presumably from boxing, remains unclear. The all-clear cannot be given until more extensive studies of both amateur and professional boxers tell us more about the risks for the brain from boxing.
This was the conclusion reached in the “Heidelberg Boxing Study”, in which high-resolution MRI data were used to search for tiny changes in the brains of amateur boxers and a comparison group of non-boxers. These changes are most likely precursors for later severe brain damage such as Parkinson’s disease or dementia.
The study by the Department of Neurology, University of Heidelberg Medical Center has now been published in the American Journal of Neuroradiology. In three of the 42 boxers, microhemorrhages were found, while in the comparison group of 37 non-boxers there were no such changes; however the difference was not statistically significant. The study was carried out jointly with National Training Center for Boxing in Heidelberg and the Department of Sport Medicine at the University of Heidelberg Medical Center (Medical Director: Professor Dr. Peter Bärtsch).
Microhemorrhages could be precursors to Parkinson’s disease and dementia
In boxing, the head is hit at a high speed and with great force. This can lead to shear movement between different brain tissues, resulting in microhemorrhages. “Injuries of this kind can be detected with the help of a modern MR imaging device with a field strength of 3 Tesla such as is available in Heidelberg,” explained Professor Dr. Stefan Hähnel, chief consultant at the Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, who conducted the study with Professor Dr. Uta Meyding-Lamadé, then chief consultant at the Department of Neurology, University of Heidelberg Medical Center, now Medical Director at Krankenhaus Nordwest in Frankfurt.
It is not known how often the microhemorrhages occur in boxers. They may eventually lead to the destruction of brain cells and deficits such as dementia and Parkinson’s disease. This hypothesis is shared by some working groups. The three boxers in whom changes were found typically had the changes in the frontal or temporal lobes, where the shear forces of blows are strongest.
A follow-up study will compare amateur boxers with professionals
One disadvantage of the “Heidelberg Boxing Study” was the great range in duration and intensity of amateur boxing. Duration ranged from one to 25 years and intensity from one to 375 bouts with 0 to 12 knockouts. A follow-up study is planned to include professional boxers, in order to assess intensive exposure to blows. The Heidelberg researchers are currently looking for funding for this study.
Boxing is possibly less dangerous for the brain than previously feared – at least for amateurs. However, conclusive statements on the level of danger are not yet possible. Whether professional boxers such as Muhammad Ali contracted their later brain conditions – in his case Parkinson’s disease at the age of 40 – presumably from boxing, remains unclear. The all-clear cannot be given until more extensive studies of both amateur and professional boxers tell us more about the risks for the brain from boxing.
This was the conclusion reached in the “Heidelberg Boxing Study”, in which high-resolution MRI data were used to search for tiny changes in the brains of amateur boxers and a comparison group of non-boxers. These changes are most likely precursors for later severe brain damage such as Parkinson’s disease or dementia.
The study by the Department of Neurology, University of Heidelberg Medical Center has now been published in the American Journal of Neuroradiology. In three of the 42 boxers, microhemorrhages were found, while in the comparison group of 37 non-boxers there were no such changes; however the difference was not statistically significant. The study was carried out jointly with National Training Center for Boxing in Heidelberg and the Department of Sport Medicine at the University of Heidelberg Medical Center (Medical Director: Professor Dr. Peter Bärtsch).
Microhemorrhages could be precursors to Parkinson’s disease and dementia
In boxing, the head is hit at a high speed and with great force. This can lead to shear movement between different brain tissues, resulting in microhemorrhages. “Injuries of this kind can be detected with the help of a modern MR imaging device with a field strength of 3 Tesla such as is available in Heidelberg,” explained Professor Dr. Stefan Hähnel, chief consultant at the Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, who conducted the study with Professor Dr. Uta Meyding-Lamadé, then chief consultant at the Department of Neurology, University of Heidelberg Medical Center, now Medical Director at Krankenhaus Nordwest in Frankfurt.
It is not known how often the microhemorrhages occur in boxers. They may eventually lead to the destruction of brain cells and deficits such as dementia and Parkinson’s disease. This hypothesis is shared by some working groups. The three boxers in whom changes were found typically had the changes in the frontal or temporal lobes, where the shear forces of blows are strongest.
A follow-up study will compare amateur boxers with professionals
One disadvantage of the “Heidelberg Boxing Study” was the great range in duration and intensity of amateur boxing. Duration ranged from one to 25 years and intensity from one to 375 bouts with 0 to 12 knockouts. A follow-up study is planned to include professional boxers, in order to assess intensive exposure to blows. The Heidelberg researchers are currently looking for funding for this study.
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