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Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer

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Assessing fatigability in mobility-intact older adults.

Eleanor M Simonsick¹, Jennifer A Schrack, Nancy W Glynn

¹Intramural Research Program, National Institute on Aging, Baltimore, Maryland.

Journal of the American Geriatrics Society

|January 15, 2014

Summary

This summary is machine-generated.

Fatigue and fatigability are common in older adults, affecting mobility. Perceived exertion during a standardized task is a promising measure for identifying fatigability in older individuals.

Keywords:

fatigability fatigue mobility performance measures validation

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Area of Science:

Gerontology
Exercise Physiology
Clinical Assessment

Background:

Fatigability, a decline in performance or increased perceived effort, is common in older adults.
Understanding fatigability is crucial for assessing functional decline and maintaining independence in aging populations.

Purpose of the Study:

To evaluate the criterion validity of two measures of fatigability: performance deterioration and perceived exertion.
To assess the prevalence and correlates of fatigability in a cohort of older adults.

Main Methods:

Cross-sectional analysis of data from the Baltimore Longitudinal Study of Aging (BLSA).
Participants (N=605, aged 65-97) underwent a 400-m walk and a 5-minute treadmill walk.
Fatigability was measured by walk performance (speed, completion) and perceived exertion (Borg scale); criterion measures included self-reported fatigue and objective mobility tests.

Main Results:

23% of mobility-intact older adults showed performance deterioration during the 400-m walk.
One-third reported high perceived exertion after a slow treadmill walk.
Slowing during the walk was weakly linked to objective mobility, while perceived exertion correlated with fatigue and mobility deficits.

Conclusions:

Performance deterioration during a single walk may underestimate fatigability in older adults.
Assessing perceived exertion during a defined workload shows promise for identifying fatigability.
Fatigability is common in healthy older adults and may impact mobility; its assessment can aid early identification of functional decline.