Physical aspects of healthy aging: assessments of three measures of balance for studies in middle-aged and older adults.

Objectives. To investigate the reliability and correlations with age of the balance components of the EPESE, NHANES, and the Good Balance Platform System (GBPS) in a normal population of adults. Design.

Performance-based measures of physical function for high-function populations.

Objectives: To improve and broaden the applicability of performance-based measures of function for use in clinical and research settings.

Design: Cross-sectional repeated-measures study.

Setting: Research clinic.