열 자극 후 저강도 근력 트레이닝이 여성 노인의 하지 근골격계 및 성장관련인자에 미치는 영향

Abstract

The purpose of this study was to investigate the effects of low-intensity strength training after heat stress on lower extremity musculoskeletal system and growth related factors in older women. Fifteen older women without any medical problems were randomly assigned to low-intensity strength training after heat stress group(LSTHS group, n=8) and moderate strength training(MST, n=7). Before the experiment, subjects participated in one repetition maximum test. Also, knee joint’s isokinetic muscle testing using the Isokinetic dynamometer(Biodex system 3, New York, USA) and the cross-sectional area(CSA) of the femur was measured using a computed tomography machine(Somatom Plus 4, SIEMENS, Germany) were measured before and after exercise treatment. Resting blood samples were assessed before and after the exercise treatment. As a results, there was no significant difference in HSP72 level and isokinetic strength between group and time, respectively. IGFBP-3 and IGF-1 level were significantly increased after training compared with before training, respectively. In addition, quardriceps muscle CSA were significantly increased after training compared with before training, while, femur CSA was no significant difference between group and time. In conclusion, low-intensity strength training after heat stress has a positive effect on lower extremity musculoskeletal system and growth related factors as well as moderate strength training.