성장기 유도선수들의 단기 체중감량과 체성분, CK, LDH 및 HGH의 관계

다국어 초록 (Multilingual Abstract)

The purpose of this study is to identify the effects of a short term weight reduction (STWR) on body composition, biomarkers of cell damage (CK, LDH) and human growth hormone (HGH) in growing period Judo players. Subjects were 10 adolescent Judo players who have been practicing Judo-related training for several years. Subjects reduced about 5 percent of body weight by Judo exercise and dietary control in the short term 5 days. We measured and analyzed variables, such as, body compositions (body weight, mineral, fat mass, body fat percentage, WHR, muscle mass, lean body mass), CK (creatine kinase), LDH (lactate dehydrogenase) and HGH (human growth hormone) before and after weight reduction. The results are as follows. First, Weight loss of about 5% in short term related to significant reduction in all components of body compositions (p<.001). Second, STWR in adolescent Judo players induced decrease in fat mass around 3 times in response to weight loss percentage. STWR also decreased in body fat percent age about 2 times of weight loss rate. Lean body mass and muscle mass were also decreased by about 65% of the level of weight loss. Third, STWR decreased CK activity significantly (p<.05), while it seems to elevate LDH activity. Fourth, STWR in young Judo players tends to decrease HGH level (t=2.156, p=.059). In summary, STWR in adolescent Judo players decreased all compo nents of body composition. There was no evidences of cell damage by STWR in trained young Judo players. However, STWR in growing period Judo players tends to show an importance of CK and LDH in the pathway of energy metabolism. STWR also showed the decrease tendency of HGH level, which suggests the possibility of growth disturbance by frequent participation of match and weight reduction in growing period Judo players.

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