Acute impact of submaximal resistance exercise on immunological and hormonal parameters in young XXXX .

@entity1 @entity404 @entity281 @entity701 @entity405
In this study, we examined the acute effects of submaximal resistance exercise on immunological and hormonal parameters in 7 resistance-trained and 10 non-resistance-trained males. The @entity1 , who were aged 29.5 +/- 7.1 years (mean +/- s), performed submaximal resistance exercise at 75% of their one-repetition maximum. Blood samples were taken before, during, immediately after, and 30, 60 and 120 min after exercise and analysed for leukocyte subpopulations and stress hormones. Total leukocytes, neutrophils and monocytes increased during exercise, reaching their maximum 2 h after exercise. Lymphocytes increased during exercise, T-helper cells returned to resting values after exercise, and natural killer cells and T-suppressor cells decreased below resting values. The @entity404 / @entity405 ratio decreased during exercise but increased during recovery. The resistance-trained @entity1 tended to have lower T-helper cell counts before, during and immediately after exercise and a lower @entity404 / @entity405 ratio during recovery than the non-resistance-trained @entity1 . Plasma @entity701 correlated positively with leukocytes during exercise (r = 0.572, P < 0.05), but negatively with T-helper cells 30 and 60 min after exercise (r = -0.573, P < 0.05; r = -0.642, P < 0.01, respectively). Our results indicate that resistance exercise leads to acute changes in leukocyte counts, despite moderate hormonal changes, independent of training status. Regular resistance exercise might lead to decreased T-helper cell counts and a lower @entity404 / @entity405 ratio, which could increase susceptibility to @entity281 .
