Pedersen A N, Ovesen L, Schroll M, Avlund K, Era P
Department of Nutrition, Danish Veterinary and Food Administration, DK-2860 Søborg, Denmark.
J Nutr Health Aging. 2002;6(6):413-20.
To measure body composition and analyse the relation to muscle strength, physical activity and functional ability in healthy, old subjects, and to relate the results to an optimal BMI level for the elderly.
Subjects aged 80 years living at home from the 1914-population in Glostrup, Denmark.
121 men and 113 women had their height and weight measured. Body fat mass and fat-free mass were assessed by bioelectrical impedance. Muscle strength was measured as handgrip, elbow flexion, knee extension, body flexion and body extension. Physical activity was self reported and functional ability was assessed by the Physical Performance Test (PPT) and self reported mobility including information about tiredness and help.
After dividing BMI into three groups: BMI < 24, BMI 24-29 and BMI > 29 no relationship was seen between a BMI interval of 24-29 kg/m2, and physical activity and functional ability. BMI was related to body fat mass, and FFM was related to muscle strength. Muscle strength was related to mobility and PPT. Mobility and PPT were mutually related and were related to physical activity.
Our cross sectional study did not support newly proposed guidelines for the elderly of an optimal BMI interval of 24-29 kg/m2. We found relations between body composition, muscle strength, physical activity and functional ability.
测量健康老年受试者的身体成分，分析其与肌肉力量、身体活动及功能能力的关系，并将结果与老年人的最佳体重指数（BMI）水平相关联。
研究对象为丹麦格罗斯特鲁普1914年出生的80岁居家老人。
测量了121名男性和113名女性的身高和体重。通过生物电阻抗评估体脂质量和去脂体重。肌肉力量通过握力、肘部屈曲、膝关节伸展、身体前屈和身体后伸进行测量。身体活动通过自我报告，功能能力通过身体性能测试（PPT）和自我报告的活动能力进行评估，包括疲劳和帮助方面的信息。
将BMI分为三组：BMI<24、BMI 24 - 29和BMI>29后，未发现BMI在24 - 29 kg/m²区间与身体活动和功能能力之间存在关联。BMI与体脂质量相关，去脂体重与肌肉力量相关。肌肉力量与活动能力和PPT相关。活动能力和PPT相互关联，且与身体活动相关。
我们的横断面研究不支持新提出的老年人最佳BMI区间为24 - 29 kg/m²的指南。我们发现了身体成分、肌肉力量、身体活动和功能能力之间的关系。
