Costa Taiguara Bertelli, Neri Anita Liberalesso
Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Brasil.
Cad Saude Publica. 2011 Aug;27(8):1537-50. doi: 10.1590/s0102-311x2011000800009.
The literature shows methodological differences in measuring physical activity in relation to frailty in the elderly. Therefore, the aim of the present study, part of FIBRA (the Frailty in Brazilian Elderly study), was to investigate relationships between frailty and measurements of physical activity. The study used a probabilistic sample of 689 elderly (72.28 ± 5.40 years; 68.21% women). An adapted version of the Minnesota Leisure Time Physical Activity Questionnaire was used and two criteria were established for measuring physical activity: regular physical exercise and weekly calorie expenditure during physical exercise and household activities. Of the total sample, 15.09% scored on weight loss, 17.13% on fatigue, 16.96% on low grip strength, 15.87% on slow gait, and 43.02% on comorbidities. According to the calorie expenditure criterion, 83.55% of the elders were classified as active, as compared to 45.27% according to the physical activity criterion. Low calorie expenditure was associated with low grip strength, slow gait, and advanced age. Sedentary lifestyle (limited physical activity) was associated with comorbidities. Calorie expenditure was more sensitive for measuring frailty, while physical activity was more sensitive for measuring health status.
文献表明，在测量老年人身体活动与虚弱程度的关系方面存在方法上的差异。因此，本研究作为巴西老年人虚弱研究（FIBRA）的一部分，旨在调查虚弱与身体活动测量之间的关系。该研究采用了689名老年人的概率样本（年龄72.28±5.40岁；女性占68.21%）。使用了明尼苏达休闲时间身体活动问卷的改编版本，并建立了两个测量身体活动的标准：定期体育锻炼以及体育锻炼和家务活动期间的每周卡路里消耗。在总样本中，15.09%的人有体重减轻得分，17.13%有疲劳得分，16.96%有握力低得分，15.87%有步态缓慢得分，43.02%有合并症得分。根据卡路里消耗标准，83.55%的老年人被归类为活跃，而根据身体活动标准这一比例为45.27%。低卡路里消耗与低握力、步态缓慢和高龄相关。久坐不动的生活方式（身体活动受限）与合并症相关。卡路里消耗在测量虚弱方面更敏感，而身体活动在测量健康状况方面更敏感。
