earticle

영어

This study was done to figure out how long-term athletics training done by adolescent with mental retardation affects physical fitness, neurotransmitter and stress hormone. 7 male adolescent were chosen for the subjects, who are with mental retardation and haven't taken part in special exercise program, attending specialized high school in G-gun, Jeollanam-do. The athletics program was done consistently for 30 weeks as follows; 5 times a week(from Monday to Friday), which was 60 minutes exercise program at an intensity of 45-75%HRmax for the first four weeks in the playground, 90 minutes exercise program at an intensity of 55-85%HRmax for the following 5 to 15 weeks in the playground and 120 minutes exercise program at an intensity of 55-85%HRmax for the following 16 to 30 weeks in the local track-and-field stadium. Blood collection and measuring physical fitness was done before exercise, 15 weeks afterwards, and 30 weeks after exercise when the subjects were in a steady state. Results are as follows. Physical fitness in doing sit-up, push-up, trunk forward flexion(p<.01) and grip strength(p<.05) was improved meaningfully due to long-term athletics training, which was effective in increasing muscle endurance, developing flexibility and strengthening muscles. Additionally, serotonin, which is neurotransmitter, decreased meaningfully(p<.01) after 30 weeks exercise program and cortisol, which is stress hormone, increased meaningfully(p<.05) after 30 weeks exercise program.