Ambulatory Activity, Body Composition, and Lower-Limb Muscle Strength in Older Adults
David Scott, Leigh Blizzard, James Fell, Graeme Jones
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE | LIPPINCOTT WILLIAMS & WILKINS | Published : 2009
PURPOSE: It is unclear how the amount of ambulatory activity (AA) participated in by older adults relates to body composition or leg strength. The aim of this study was to describe associations of pedometer-determined AA with body fat and leg muscle parameters in community-dwelling 50- to 79-yr-olds. METHODS: A cross-sectional study of 982 randomly recruited subjects was conducted (51% female; mean age = 62 +/- 7 yr). Dual-energy x-ray absorptiometry measured body composition, including total body fat, trunk fat, and leg lean mass. Isometric strength of the quadriceps and hip flexors was measured using a dynamometer. Leg muscle quality was calculated as kilograms of leg strength per kilogram..View full abstract
The authors thank the TASOAC staff and volunteers, particularly the study coordinator Catrina Boon. The authors are also extremely grateful to the TASOAC subjects, whose participation made this study possible.This study was supported by the National Health and Medical Research Council of Australia, the Arthritis Foundation of Australia, the Tasmanian Community Fund, and the University of Tasmania Institutional Research Grants Scheme.The conclusions drawn from the results of the present study represent the opinions of the authors and do not constitute endorsement by American College of Sports Medicine.