摘要：Problem Statement:Limited physical functional performance as a consequence of aging is considered as a possible contributor to falls in older adults,even in physically active ones. Purpose: This study determines which clinical and laboratory tests simulating activities of daily living could distinguish age-related differences in functional performance of physically active older adults.Material and Methods:In this study,30 participants aged 60–69 years (23 females and 7 males;age 65.5 ± 1.9 years;height 168.0 ± 10.4 cm;weight 74.7 ± 13.0 kg) and 20 participants aged 70–79 years (14 females and 6 males;age 74.9 ± 5.0 years;height 166.7 ± 10.5 cm;weight 70.2 ± 12.7 kg) underwent battery of clinical and laboratory tests. Time to completethe five-repetition sitto-stand test (5RSTS),maximal reaching distance in the frontal and sagittal plane and centre of pressure (CoP) sway in the anteroposterior (AP) and mediolateral (ML) directions during bipedal stancewere evaluated. In addition,CoP sway and its AP and ML components during stair descent (CoPAP and CoPML) and in the first 5 s of re-stabilization (CoPAP-5 and CoPML-5) were evaluated.Results: Older adults over 70 years of ageachieved significantly longer time in the 5RSTS test (12.3%,P = .035,d =.632) and had significantly higher values of CoP sway in the first 5 s of re-stabilization (CoPAP-5 19.4%,P = .003,d = .889;CoPML-5 15.7%,P = .044,d = .593) compared to those aged 60–69 years. Conclusions: Differences in balance control attributable to ageing were more readily seen under more challenging conditions.Only the 5RSTS test and stair descent from one step onto a compliant surface test were able to reflect differences in functional performance between two groups of physically active older adults.
