(Department of Physical Education,Zhengzhou University of Aeronautics,Zhengzhou 450015,China) Abstract: The author observed the effects of 12-week time-specific (early morning and early evening) strength training and detraining (for 4 weeks and 6 weeks) on the sports abilities of young male basketball players, and probed into the pat-tern of daily rhythmically changing of sports abilities, so as to provide a theoretical basis for making training plans scien-tifically. The author divided 36 young male basketball players randomly into an early morning training group (MT, training time: 07:00~08:00 in the early morning), an early evening training group (ET, training time: 17:00-18:00 in the early eve-ning), and a control group (C), let the players in groups MT and ET undergo 12-week strength training, let the players in group C maintain daily living habits unchanged and undergo no training, and measured their body temperature and maxi-mum muscle strength and did the Wingate experiment in the early morning (at 07:00) and in the early evening (at 17:00) before training, after training, 4 weeks after detraining and 6 weeks after detraining respectively. Results: the temperature of all the testees in various groups measured at 17:00 was higher than that measured at 07:00 (P<0.01); the maximum vol-untary contraction (MVC), peak power (PP) and mean power (MP) of quadriceps femoris of the testees in groups ET and C measured at 17:00 were higher than those measured at 07:00 (P<0.01); various sports ability parameters of the testees in groups ET and MT increased significantly after training, were still higher than those measured before training when meas-ured after detraining for 4 weeks, but returned to their normal values after detraining for 6 weeks. The results indicate the followings: time-specific strength training has no significant effect on body temperature; strength training in the early morning can eliminate the daily rhythmic changing of anaerobic sports abilities; the sports abilities acquired after strength training can maintain up to 4 weeks, but gradually fade away after detraining for 6 weeks. Key words: sports biomechanics;time-selected strength training;sports ability;detraining;young male basketball player |