Abstract des Autors

The aim of this study was to evaluate the effects of training suspension on the principal cardiorespiratory parameters. Twelve young male cyclists (mean age 24.2+/-5.8 years, range 18-32 years) and 12 pregeriatric cyclists (mean age 54.2+/-5.2 years, range 50-65 years) were studied during maximal exercise test on a bicycle (50 watt x 3 min) with determination of gas exchange parameters, before and after 2 months of detraining. The same parameters were determined in 2 control groups of 12 young sedentary subjects (mean age 22.7+/-1.9 years, range 19-25) and 12 pregeriatric sedentary subjects (mean age 58.2+/-5.6 years, range 50-65). After 6-8 weeks of detraining maximal work-load (wattmax) and maximal oxygen uptake (VO2max, ml/min) decreased while submaximal heart rates (100 and 150 watts) were higher both in the young group and in the older group. Also maximal pulmonary ventilation was significantly decreased in pregeriatric cyclists (106.8+/-13.9 vs 89.5+/-9.5; p<0.05). Neverthless, after detraining both young and older cyclists still performed a more prolonged test reaching higher wattmax, VO2max, VEmax and lower submaximal heart rates in respect to sedentary subjects of the same age (168.5+/-8.9 vs 150.2+/-6.5; p<0.05). Before and after detraining, the pregeriatric cyclists reached higher maximal heart rates than the sedentary subjects of the same age and higher maximal work-load, VO2max and VE max also in respect to young sedentary subjects (p<0.05). In conclusion, as like as young athletes also in pregeriatric cyclists aerobic training determines important changes beneficial to cardiorespiratory adaptations to aerobic training regress significantly after 2 months of detraining, but cardiorespiratory performance is still significantly better than in younger sedentary subjects. Verf.-Referat