Author(s): NISHIZAWA, T., Institution: SHIGAKKAN UNIVERSITY, Country: JAPAN, Abstract-ID: 2524

INTRODUCTION:
We reported that resistance exercise set to music can be performed in a "fun" and "light" state, while still providing an exercise intensity that improves cardiopulmonary function. Therefore, the purpose of this study is to clarify the effects of endurance resistance training (E-RT) accompanied by music on improving lower limb muscle strength in elderly people. This effect will be clarified by investigating leg muscle strength, physical fitness, and body composition (skeletal muscle mass).
METHODS:
The study was conducted from May 8 to July 31, 2025. Health exercise classes were held at K Community Center, once a week for one hour, for a total of 10 sessions. The subjects were approximately 20 local men and women in their 60s to 80s. Physical fitness was measured using the "New Physical Fitness Test (Agency for Sports)." A 10m Obstacle Walk (10mOW) was performed to assess walking ability, and One-Legged Standing with eyes open (OLS) was performed to measure balance ability. Leg Muscle Strength (LMS) was assessed using a leg dynamometer (Takei Machinery Co., Ltd.). Skeletal muscle mass (SMM) was measured using InBody device. To make exercise aimed at improving lower limb muscle strength enjoyable, the exercise was performed to music (BPM 90-100). The exercises consisted of eight types: side lunges, heel raises and lowers, knee lifts, side touches, leg curls, back lunges, and marches. Each exercise consisted of 6 to 8 sets of 16 counts, and the exercise lasted 10 minutes.
RESULTS:
The results of the OLS and 10mOW showed no exercise-related changes in either men or women. The Leg Muscle Strength results for all subjects were 40±16.8 kg before ERT and 49.5±14.7 kg after ERT. For men, it was 56.5±8.7 kg before ERT and 62.6±10.8 kg after ERT. For women, it was 30.1±13.5 kg before ERT and 40.3±9.0 kg after ERT. No significant differences were found between before and after ERT. The results for LMS and SMM showed no changes with exercise in either men or women. The relationship between whole-body skeletal muscle mass and leg muscle strength before ERT was r = 0.632 (n = 12), indicating a strong correlation. The relationship between LMS and SMM before ERT was r = 0.666 (n = 12), indicating a “strong” correlation. After ERT, the relationship was r = 0.691 (n = 12), indicating a strong correlation.
CONCLUSION:
The purpose of this study was to clarify what changes occur in muscle mass and strength after exercise instruction that includes resistance training. The results showed a "strong" correlation between LMS and SMM. However, since SMM and physical fitness test scores were high before exercise, there was no change and physical fitness was maintained. In the future, more effective program designs will be required, such as increasing the frequency and duration of exercise to two to three times a week, incorporating strength training into daily life.