Abstract
Background: Sarcopenia classification is important for prevention or intervention of sarcopenia in the elderly. However, measures used for the current sarcopenia criteria, including muscular strength, could be impacted by forms of arthritis. Thus, it is crucial to understand the impact arthritis has on sarcopenia status. Objectives: The aim was to investigate if arthritis relates to sarcopenia classification via grip strength or single chair stand in older women. A secondary aim was to assess the relationship between grip strength and upper and lower body strength in those with arthritis. Design: A cross-sectional analysis. Setting and participants: Sixty-one community-dwelling older women (71.9±4.6 years) from Rhode Island. Measurements: Sarcopenia status was classified using established working definitions. Grip strength was measured using a hand grip dynamometer, chair stands were measured via a single chair stand test, and gait speed was assessed using a four-meter walk test. A segmental multi-frequency bioelectrical impedance analysis assessed body composition and arthritis status was based on self-report. Upper and lower body muscular strength were measured using a chest press and leg press one repetition maximum. Results: No associations were observed between arthritis and sarcopenia status (p=0.36) nor arthritis and upper or lower body muscular strength and grip strength. Conclusions: The results of this study may indicate that arthritis is not associated with sarcopenia status but may affect other measures of muscular strength.
Highlights
Sarcopenia is defined as the loss of muscular strength, functionality, and lean mass with aging [1,2] that is related to functional limitations [3]
When assessing maximal muscular strength measures for the women (n=25) who partook in the baseline testing for the URI RESTORE ME study with arthritis, there were no significant correlations between grip strength and chest press 1 RM (CP1RM) (r=-0.226, p=0.438), grip strength and LP1RM (r=-0.118, p=0.688), and CP1RM and LP1RM (r=0.389, p=0.152)
The results of the present study indicate that arthritis was not associated with sarcopenia status in this population of older women based on multiple sarcopenia working definitions
Summary
Sarcopenia is defined as the loss of muscular strength, functionality, and lean mass with aging [1,2] that is related to functional limitations [3]. The International Working Group uses this measure in their working definition because the ability to rise from a chair is considered an activity of daily living that requires adequate muscular strength [7,13]. Functional limitations such as arthritis could negatively affect muscular strength measurements based on the current sarcopenia working definitions. OBJECTIVES: The aim was to investigate if arthritis is related to sarcopenia classification via grip streng th or single chair stand in older women. RESULTS: No associations were observed between arthritis and sarcopenia status (p=0.36) nor arthritis and upper or lower body muscular strength and grip strength. CONCLUSIONS: The results of this study may indicate that arthritis is not associated with sarcopenia status but may affect other measures of muscular strength
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