Chen Emma H, Bergdahl Andreas, Roberts Mary
Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montréal, Québec, CANADA.
Int J Exerc Sci. 2024 May 1;17(1):682-700. doi: 10.70252/TYTU2767. eCollection 2024.
Falls are the leading cause of injury-related deaths among older adults and affect women at disproportionate rates. Dance has been used to improve postural stability, balance confidence and strength of older adults, but in-person classes are often inaccessible. This quasi-experimental pre-mid-post design study investigates whether 12 weeks of online dance classes can improve postural stability, dynamic balance and strength of women aged 65 plus. 16 participants (median=74 years, IQR=6) recruited via convenience sampling completed 12 weeks of twice weekly 75-minute online dance classes. In-person pre, mid and post assessments used 30-second trials of quiet standing, Star Excursion Balance Test, 30-second Sitto-Stand and Calf-Raise-Senior. Significance was evaluated using Friedman's test with Wilcoxon Signed-Rank test post-hoc (≤.05). Participants demonstrated a high attendance rate (median=87.5, IQR=4.2%). Decreased mediolateral sway was observed pre-mid in eyes closed (=.003, r=.76) and foam (.02, r=.60) conditions, where the latter also produced decreased sway area (=.015, r=.63). Greater dynamic balance was demonstrated when reaching laterally (pre-mid =.008, r=.68; pre-post =.008, r=.69) and posterior-laterally (pre-post =.009, r=.75). Participants significantly improved their number of repetitions on the Calf-Raise Senior (mid-post =.02, r=.60; prepost =.015, r=.63). Online dance classes are engaging, accessible and effective in decreasing older women's risk of falls and maintaining their independence.
跌倒是老年人与伤害相关死亡的主要原因，且对女性的影响比例过高。舞蹈已被用于改善老年人的姿势稳定性、平衡信心和力量，但面对面课程往往难以获得。这项准实验性的前-中-后设计研究调查了为期12周的在线舞蹈课程是否能改善65岁及以上女性的姿势稳定性、动态平衡和力量。通过便利抽样招募的16名参与者（中位数=74岁，四分位距=6）完成了为期12周、每周两次、每次75分钟的在线舞蹈课程。面对面的前、中、后评估使用了30秒的安静站立试验、星状偏移平衡测试、30秒坐立试验和老年提踵试验。使用Friedman检验和Wilcoxon符号秩检验进行事后显著性评估（≤.05）。参与者表现出较高的出勤率（中位数=87.5，四分位距=4.2%）。在闭眼（P=.003，r=.76）和泡沫条件下（P=.02，r=.60），观察到前后中外侧摆动减少，其中后者也导致摆动面积减小（P=.015，r=.63）。当向外侧伸展时（前-中P=.008，r=.68；前-后P=.008，r=.69）和后外侧伸展时（前-后P=.009，r=.75），表现出更大的动态平衡。参与者在老年提踵试验中的重复次数显著增加（中-后P=.02，r=.60；前-后P=.015，r=.63）。在线舞蹈课程引人入胜、易于参与，并且在降低老年女性跌倒风险和维持其独立性方面有效。
