Older adults with diabetes are at high risk of developing sarcopenia. A preclinical stage, known as "probable sarcopenia" (defined by low muscle strength), represents a critical window for early intervention. Physical activity is an effective strategy, but many patients struggle to maintain regular exercise. This parallel-group randomized controlled trial aims to evaluate the effectiveness of a 12-week home-based, short-bout combined aerobic and resistance exercise program on physical activity level and muscle strength among older adults with diabetes and probable sarcopenia.