Makoto Ayabe1,2, Hideaki Kumahara1,3, Ayako Yamaguchi-Watanabe1, Hitoshi Chiba4, Noriko Kobayashi5, Ichiro Sakuma6, Kojiro Ishii1,7. 1. Laboratory of Physical Fitness and Sports Medicine, Graduate School of Education, Hokkaido University , Sapporo , Japan. 2. Faculty of Computer Science and Systems Engineering, Okayama Prefectural University , Okayama , Japan. 3. Faculty of Nutritional Sciences, Nakamura Gakuen University , Fukuoka, Japan. 4. Faculty of Health Sciences, Hokkaido University , Sapporo , Japan. 5. Department of Gynecology, Hokkaido University Hospital , Sapporo , Japan. 6. Caress Sapporo, Hokko Memorial Clinic , Sapporo , Japan. 7. Faculty of Health and Sports Science, Doshisha University , Kyoto , Japan.
Abstract
Background: It remains unclear how past exercise habits can affect the skeletal muscle mass in adulthood in Japanese populations. Aim: The purpose of the present investigation was to examine the association of appendicular muscle mass (AMM) and skeletal muscle mass index (SMI) with the history of exercise and/or physical activity participation in Japanese women. Subjects and methods: One hundred and twenty females, aged between 18 and 28 years old, participated in the present investigation. Using a dual-energy X-ray absorptiometry scanner, the appendicular lean soft tissue, which is considered as a measure of AMM, was evaluated. Skeletal muscle mass index (SMI) was also assessed. Furthermore, all subjects answered a physical activity questionnaire. Results: Exercise habits at 7 years of age or older positively affected the AMM and SMI. The results of the multiple regression analysis showed that exercise history at 16-18 years of age as well as the current status of exercise and/or physical activity participation was a significant predictor of SMI and AMM. Conclusions: These results indicate that not only the past history of participation in physical and/or sports activities but also the current status of daily physical activity and sports activity play an important role in maintaining appropriate SMI and AMM in young women.
Background: It remains unclear how past exercise habits can affect the skeletal muscle mass in adulthood in Japanese populations. Aim: The purpose of the present investigation was to examine the association of appendicular muscle mass (AMM) and skeletal muscle mass index (SMI) with the history of exercise and/or physical activity participation in Japanese women. Subjects and methods: One hundred and twenty females, aged between 18 and 28 years old, participated in the present investigation. Using a dual-energy X-ray absorptiometry scanner, the appendicular lean soft tissue, which is considered as a measure of AMM, was evaluated. Skeletal muscle mass index (SMI) was also assessed. Furthermore, all subjects answered a physical activity questionnaire. Results: Exercise habits at 7 years of age or older positively affected the AMM and SMI. The results of the multiple regression analysis showed that exercise history at 16-18 years of age as well as the current status of exercise and/or physical activity participation was a significant predictor of SMI and AMM. Conclusions: These results indicate that not only the past history of participation in physical and/or sports activities but also the current status of daily physical activity and sports activity play an important role in maintaining appropriate SMI and AMM in young women.
Entities:
Keywords:
Physical activity; lean body mass; lean soft tissue; sarcopenia