This comparative study examined the effects of regular low intensity aerobic exercise on oxidative stress markers in older adults. The study was carried out on 15 sedentary subjects (age: 65.1 ± 3.5 years) versus 18 subjects performing fitness exercises (age: 65.8 ± 3.3 years). Before and after an incremental exercise test, oxidative stress markers were assessed. Superoxide dismutase was higher at rest and at the recovery for the physically active subjects compared with sedentary subjects (p < .05). At recovery, glutathione peroxidase and α -Tocopherol increased significantly above the resting values only in the active group (p < .05). Malondialdehyde had increased in both groups (p < .01), associated with a higher level in the sedentary group (p < .05) at the recovery. These data suggest that low intensity aerobic exercise may be useful to prevent the decline of antioxidants linked with aging.
Mohamed A. Bouzid, Omar Hammouda, Régis Matran, Sophie Robin and Claudine Fabre
Jérémy B. J. Coquart, Yancy Dufour, Alain Groslambert, Régis Matran and Murielle Garcin
The purpose was to study the relationships between psychological factors and perceptually-based values (Ratings of Perceived Exertion: RPE and Estimated Time Limit: ETL). The researchers obtained the scores of several psychological factors (anxiety, extraversion-introversion, neuroticism-stability, self-esteem, motivation, psychological resistance and endurance, desire for success, social desirability, dynamism, competitiveness, activity control, risk-taking, emotional control, aggressiveness, sociability, cooperation, acceptance of a judgment, and leadership) among 23 cyclists. The cyclists performed a graded exercise test in which the researchers collected RPE and ETL at 150, 200, 250 and 300W. Correlations between RPE/ETL and psychological factors were examined. RPE was correlated with leadership, psychological resistance and endurance. ETL was significantly correlated with psychological endurance. These results suggest a link between psychological factors, effort perception, and the time limits predicted by teleoanticipation. These relationships varied according to intensity.