Weight training 이 근력 및 근섬유 형태 변화에 미치는 영향 = Strength and muscle morphological adaptation after moderate weight training in Man

다국어 초록 (Multilingual Abstract)

Eight healthy males performed moderate training program 3days per week for 10weeks.
Strength was measured before and after weight training program using a Cybex Ⅱ isokinetic dynamometer set an angular velocity at 60???S?? muscle strength, 180???S?? muscle power, 180????S??50 repetition muscle endurance, respectively.
Isotonic one repetition maximum (1RM) was measured before and after training program.
Muscle biopsies were taken before and after training from vastus lateralis muscle. Obtained muscle sample serially was cutted with 10??m thick and stained for myofibrillar ATPase with preincubation at pH 10.3, 4.6, and 4.37 for identifing type Ⅰ, Ⅱa, Ⅱb and Ⅱc fibers, resectively.
Peak power output was 424 watt and increased by 10.5% after the weight training. Weight training resulted in significant increase one repetition maximum for each types of exercise. Weight training resulted in significant hypertrophy of all types : type Ⅰ (24%), typeⅡa(30%), typeⅡa(9.4%), typeⅡc(35%). In addition, the training resulted in a decrease capillaries of type Ⅰ, Ⅱa, Ⅱb fibers with a concomitant increase in type Ⅱc fibers, suggesting that moderate weight training may lead to muscle hypertrophy and possible fiber type conversions.