With the growing aging population, it has been reported that approximately 10-20% of older adults have pre-sarcopenia. Pre-sarcopenia is defined as a decline in either muscle mass or muscle strength. Previous studies have indicated that squat exercise has significant effects on improving lower-extremity muscle strength and physical performance. Early intervention through resistance exercise during the pre-sarcopenia stage may increase muscle mass, enhance physical performance, and prevent progression to sarcopenia. Therefore, the purpose of this study is to investigate the effects of squat exercise on improving pre-sarcopenia among older adults. It is expected that, following the squat exercise intervention, older adults will demonstrate significant improvements in muscle mass, lower-extremity muscle strength, physical performance, and body composition, thereby alleviating pre-sarcopenia.