Friday, July 29, 2011
Wednesday, July 27, 2011
|Keywords:||INFLAMMATION, EXERCISE - Flavanols, Antioxidants|
|Reference:||"Supplementation with a Flavanol-rich Lychee Fruit Extract Influences the Inflammatory Status of Young Athletes," Nishizawa M, Hara T, et al, Phytother Res, 2011 Feb 25; [Epub ahead of print]. (Address: Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan. E-mail: firstname.lastname@example.org ).|
|Summary:||In a randomized, double-blind, placebo-controlled study involving 20 healthy, male, long-distance runners, supplementation with a flavanol-rich lychee fruit extract was found to be associated with significant improvements in the change in serum interleukin-6 levels between pre- and mid-training, as well as significant improvements in the change in transforming growth factor-beta, pre- and post- a 2-month training. The authors conclude, "These findings suggest that FRLFE supplementation may suppress inflammation or tissue damage caused by high-intensity exercise training."|
Wednesday, July 20, 2011
Tuesday, July 19, 2011
All those hits to the head may have a lasting impact on football players. A new study shows retired NFL players are at a higher risk of developing mild cognitive impairment (MCI), which can be a precursor to Alzheimer's disease.
Individuals with MCI have trouble with memory, language or another mental function. While these problems are often apparent to the patient and others, they are not severe enough to interfere with everyday life.
Researchers screened 513 retired players and their wives with a survey. They found 35 percent of the players had scores suggesting possible MCI. The average age of the players was 61.
"It appears there may be a very high rate of cognitive impairment in these retired football players, compared to the general population in that age range," neuropsychologist Christopher Randolph, Ph.D., was quoted as saying.
A subset of the players was further screened by telephone and underwent a more extensive evaluation at a medical facility. These players were compared to two groups of nonathletes: 41 adults with no cognitive changes and 81 adults with MCI.
The impairments of retired players on neuropsychological tests were very similar to those exhibited by patients with MCI. The retired athletes with MCI were much younger and slightly less impaired overall than the group of nonathletes with MCI.
Previous animal studies have suggested that blows to the head can kill brain cells, even if the hit is not hard enough to cause a concussion. Recent studies have shown the average college football player receives more than 1,000 blows to the head with a magnitude greater than 10 g-force.
Thursday, July 14, 2011
|Topic:||Beetroot Juice containing Nitrate Improves Cycling Economy|
|Keywords:||ATHLETIC PERFORMANCE - Nitrate, Beetroot Juice|
|Reference:||"Acute dietary nitrate supplementation improves cycling time trial performance," Lansley KE, Winyard PG, et al, Med Sci Sports Exerc, 2011 June; 43(6): 1125-31. (Address: Sport and Health Sciences, College of Life and Environmental Sciences, St Luke's Campus, University of Exeter, Exeter, United Kingdom).|
|Summary:||In a randomized, crossover study involving 9 club-level competitive male cyclists, consumption of beetroot juice (0.5 L/d) containing ~ 6.2 mmol nitrate, 2.5 hours before completion of a 4- and 16.1-km cycling time trial was found to be associated with elevations in plasma nitrite and significant increases in mean power output during the 4-km and 16.1-km cycling time trials. Consumption of beetroot juice rich in nitrate was found to improve 4-km performance by 2.8% and 16.1 km performance by 2.7%. The authors state, "These results suggest that acute dietary nitrate supplementation with 0.5 L of BR improves cycling economy, as demonstrated by a higher PO for the same VO2 and enhances both 4- and 16.1-km cycling TT performance."|