THE EFFECTS OF DETRAINING AND RETRAINING ON SWIMMING PROPULSIVE FORCE AND BLOOD LACTATE

Abstract

1400 The purpose of this study was to investigate the effects of detraining and retraining on 50M and 400 M sprint time (50ST, 400ST), arm stroke propulsive power (ASP), lactate and lactate dehydrogenase (LDH) in front crawl swimming Eighteen male college swimmers (age=19.3±2.1 yrs, ht=172.6±4.6cm, wt=68.3±7.9 kg) voluntarily participated in a 85-day detraining (no training at all), followed by a 91-day retraining (3500-6000 meters of swimming training each day, 5 days a week). After 85 days of detraining, statistical analysis indicated that there were significant (p<0.05) changes. The 50ST was 3.4% slower (from 29.42 to 30.41 secs), the 400ST was 7% slower (from 5 mins 23 secs to 5 mins 48 secs), and the ASP decreased 12% (from 3.62 to 3.17 Kg · M/sec). The peak lactate value measured from 400ST was 22% lower after detraining (from 17.51 to 13.6 mM/L). After 91 days of retraining, the 50 ST and ASP did not return to the levels before detraining. There was no significant (p<0.05) change in LDH after 400ST for before detraining, after detraining and after retraining. It is concluded that 91 days of retraining will not recover the decrement of 85 days of detraining. Thus, it may be better for athletes not to interrupt their training schedule.