Wednesday, March 30, 2011
Tuesday, March 29, 2011
Saturday, March 26, 2011
Kabasakalis, Athanasios1; Kyparos, Antonios2,3; Tsalis, Georgios1; Loupos, Dimitrios1; Pavlidou, Anastasia3; Kouretas, Dimitrios3
Kabasakalis, A, Kyparos, A, Tsalis, G, Loupos, D, Pavlidou, A, and Kouretas, D. Blood oxidative stress markers after ultramarathon swimming. J Strength Cond Res 25(3): 805-811, 2011-Data on redox balance in response to marathon swimming are lacking, whereas findings from studies using other types of ultraendurance exercise are controversial. The aim of the present study was to investigate the effect of ultramarathon swimming on selective blood oxidative stress markers. Five well-trained male swimmers aged 28.8 (6.0) years participated in the study. Blood samples were obtained before and after the ultramarathon swimming, for full blood count analysis and determination of protein carbonyls, thiobarbituric acid-reactive substances (TBARS), and total antioxidant capacity (TAC). The swimmers swam 19.4 (3.4) hours, covering 50.5 (15.0) km. Hematocrit and erythrocyte count, and leukocyte, neutrophil and monocyte counts were significantly elevated after swimming, whereas protein carbonyls, TBARS and TAC did not significantly change. The findings of the present study indicate that well-trained swimmers were able to regulate a redox homeostasis during ultra-long duration swimming. It is also postulated that the relatively low intensity of marathon swimming may not be a sufficient stimulus to induce oxidative stress in well-trained swimmers. The fact that low-intensity long-duration exercise protocols are not associated with oxidative damage is useful knowledge for coaches and athletes in scheduling the content of the training sessions that preceded and followed these exercise protocols.
I found this article interesting because of all the varied ideas surrounding oxidative damage during long-duration exercise protocols over the past 20 years and how ultra- runners cyclist and swimmers were assumed to have a very high load of oxidative damage but it may appear to be related to the level of intensity.
Monday, March 21, 2011
Thursday, March 17, 2011
Researchers at McMaster University in Canada and the University of Nottingham in England recruited 15 young men, all experienced in performing resistance exercise.
The participants underwent testing to measure the rate of muscle building under two conditions: after eating 15 grams of whey protein at rest and 24 hours after a round of resistance exercise.
During the exercise portion of the study, each participant performed these activities: lifted a heavy load on a leg extension machine until fatigue a light load until fatigue; or a light load in which the workout session was stopped before fatigue set in.
Whey Protein After Workout
Each man returned to the laboratory 24 hours later and ate 15 grams of whey protein, a common dairy constituent.
Results indicate that regardless of the type of exercise load, muscle building increased after eating whey.
The findings suggest that muscles may make better use of dietary amino acids eaten 24 hours after exercise, regardless of exercise load as long as the exercise is being performed until fatigue.
The researchers say their findings suggest insights about how exercise can provide benefits to lean muscle mass growth and maintenance.
The study is published in the April 2011 issue of TheJournal of Nutrition
Friday, March 11, 2011
A Practical Approach to Monitoring Recovery: Development of a Perceived Recovery Status Scale
Laurent, C Matthew1; Green, J Matt2; Bishop, Phillip A3; Sjökvist, Jesper4; Schumacker, Randall E5; Richardson, Mark T3; Curtner-Smith, Matt3