What Measure of Lower Extremity Muscle Strength Best Explains Walking Independence?

Abstract

This study was conducted to determine if any one strength measure or combination of strength measures provided an explanation of ambulatory independence among 107 acute rehabilitation patients. This was a retrospective, descriptive, and correlational study where ambulatory function was quantified using the Functional Independence Measure (FIM). Lower extremity strength was quantified by sit to stand performance, and knee extension force measured by manual muscle testing and hand held dynamometry. Descriptive, correlational, and multiple regression statistical analysis were used. Correlation coefficients between ambulatory independence and the different strength measures ranged from .414 to .585. Sit to stand had the highest correlation coefficient with ambulatory independence (r=.585). However a combination of sit to stand performance and total knee extension force offered the best explanation of ambulatory independence (r=.617). A combination of functional and instrumental strength testing is therefore indicated in the prediction of ambulatory performance of patients in acute rehabilitation.

A Comparison of Functional Fitness and Walking Speed with Cognitive Function of Facility-Dwelling Elderly Women: a Cross- Sectional Study

“…In addition, walking speed had a very significant correlation with the lower and upper limb muscle strength, endurance, and levels of alertness. Functional fitness, the ability to perform normal everyday activities independently and safely, is one of the most important issues for older people 21) . As discussed above, the degradation of cognitive functions may cause problems in ADL and instrumental activities of daily living (IADL) that require adequate lower limb muscle strength, endurance and alertness.…”

Influence of Lower-extremity Muscle Force, Muscle Mass and Asymmetry in Knee Extension Force on Gait Ability in Community-dwelling Elderly Women

“…Generally, the physical performance of elderly individuals decreases with age [1][2][3][4] . The present study demonstrated that gait ability, balance function and lower extremity force decline with age.…”

“…Physical activities including gait ability and balance function decrease with age [1][2][3][4] . These decreases increase the risk of falls in daily living and make it difficult for elderly individuals to live a self-supporting life.…”

Functional exercise after total hip replacement (FEATHER) a randomised control trial

“…Post operative function is determined by regaining the optimal strength in this muscle and many rehabilitation programmes include strengthening of gluteus medius. The strength of this muscle provides lateral stability to the trunk and pelvis and is essential during one legged stance and also during the stance phase of gait [12]. However there is a paucity of evidence in the literature examining specific changes in this muscle despite anecdotal evidence that reduced strength in this muscle is responsible for gait impairment and reduced balance [13].…”