The effects of sprint interval training and detraining on aerobic fitness in young adults

Sprint interval training (SIT) has been known to improve aerobic performance as well as health and fitness markers in non-athletic population. However, there's not enough information about performance when SIT is stopped. The aim of this study was to investigate the effect of SIT on aerobic capacity after training and detraining process. The general design of the study was classified as before SIT, training period, after SIT and detraining period measurements. The subjects (n=26) completed baseline measurements 20-m shuttle run test and then were randomized as training and control groups. The control group continued their daily routine and the training group run SIT for 4 weeks. The 20-m shuttle run test was applied before, after training, and 4th and 8th detraining weeks.  After the training period, aerobic performance increased in the training group (p<0.05). Also, aerobic performance increases were maintained for the 4th weeks of detraining (p<0.05). But the performance increments disappeared in the 8th detraining week (p>0.05).  Taking a break from the exercise program for more than 4 weeks in healthy young individuals may cause the positive effects on maximal oxygen uptake (VO2max) of SIT to disappear. SIT participants should not take a break from exercise for more than 4 weeks to maintain aerobic gain.