Abstract
OBJECTIVE: To investigate the effects of modified stepping exercises over six weeks on functional mobility and individual lower extremity muscle strength in community-dwelling older individuals. METHODS: This prospective randomized controlled trial design was conducted in thirty-two older adults who completed a modified stepping exercises program (n=16 for soft-surface stepping exercise; n=16 for firm-surface stepping exercise). These exercises were practiced for 50 minutes/day, three days/week, over six weeks. They were assessed for their functional mobility relating to levels of independence at baseline, after 4 weeks, after 6 weeks of intervention, and at 1 month after the last intervention sessions. RESULTS: Both groups showed significant improvements in functional mobility, lower extremity muscle strength, and walking speed after 4 and 6 weeks of intervention, as well as at the one-month follow-up. However, the soft-surface stepping exercise group exhibited significantly greater improvements in dynamic balance (p=0.035) and lower extremity muscle strength (p=0.015) compared to the firm-surface stepping exercise group after 6 weeks of intervention. Additionally, the soft-surface group demonstrated superior gains in hip flexor (p=0.041), hip extensor (p=0.047), hip adductor (p=0.026), and hip abductor strength (p=0.046), with these enhancements maintained at the one-month follow-up. CONCLUSION: Soft-surface stepping exercise that involves whole-body movements offers a promising alternative to promote independence and safety among community-dwelling older adults. This study underscores the need for future research to evaluate the sustained impact of these benefits post-intervention, particularly during a retention period following the intervention.