Perceived exertion during incremental cycling is not influenced by the type A behavior pattern

Recherche d'une relation entre la perception de la fatigue, le seuil de tolérance à l'effort et le psychisme des sujets : incidence du comportement de type A

Vitamin E differentially affects short term exercise induced changes in oxidative stress, lipids, and inflammatory markers.

Abstract Background and Aim Physical activity or exercise is a proven deterrent of cardiovascular diseases. The purpose of this study was to examine whether vitamin E supplementation interfere with the potential benefits of exercise. Methods and results A total of 455 apparently healthy men and women were recruited, for a 2-month aerobic/cardiovascular exercise program. Subjects were randomly assigned for soft gel vitamin E or placebo (800 IU), and required to give blood at 0, 2, 4 and 8 weeks of exercise. Levels of lipid and markers of oxidative stress and inflammation were measured along with the VO2 and duration time spent on treadmill. Statistical analysis did not show significant changes in the levels of lipids and markers of oxidative stress and inflammation. Favorable trends among both of the randomization groups were observed in lipids, and some of the oxidative stress and inflammatory markers. This study also established several interesting correlations between VO2, and lipids on one hand and markers of oxidation and inflammation on the other hand. Reduction in LDL levels positively associated with increased levels of MCP-1 ( P P P Conclusions Exercise training induces oxidative stress might be instrumental in favorable lipid reduction and markers of oxidative stress and inflammation. However interestingly, vitamin E didn't demonstrate favorable effects on the level of oxidative stress and inflammation associated with exercise

Physical inactivity and cardiovascular risk: baseline observations from men and premenopausal women.

Introduction: Physical activity or exercise is a proven deterrent of cardiovascular (CV) diseases. Purpose: In this study, we examined the relationships between baseline values of parameters related to physical activity and known markers of CV disease, including markers of oxidative stress. Methods: A total of 455 healthy men and women between the ages of 18 and 50 were recruited to participate in the study. Levels of lipids/lipoproteins and markers of oxidative stress and inflammation were measured along with the VO2 and duration time spent on treadmill. Results: Women, in general, had a significantly (P<0.0001) higher plasma high density lipoprotein (1.51±0.30 mmol/l), decreased (P<0.0001) low density lipoprotein (LDL) (2.75±0.66 mmol/l), and decreased (P<0.0001) triglycerides levels (2.09±0.85 mmol/l), compared with males (1.21±0.23 mmol/l, 2.92±0.81 mmol/l, and 3.02±1.34 mmol/l, respectively). There was a direct correlation between the levels of plasma LDL and the levels oxidized LDL levels (P<0.0001) in both men and women. Despite a better antiatherogenic lipid profile, the levels of C-reactive protein in women were significantly (P<0.0001) elevated (3.78±3.66 ng/ml) as compared with those in men (1.82±2.37 ng/ml). Conclusion: These results suggest intrinsic sex differences between men and women in relation to atherogenic risk. J. Clin. Lab. Anal. 24:100–105, 2010. © 2010 Wiley-Liss, Inc