Article

OBJECTIVE: To examine the relationship between physical activity (assessed
subjectively and objectively), knee muscle strength, gait performance, age,
gender, and body mass index (BMI) in persons with late effects of polio. DESIGN:
Cross-sectional. SETTING: A university hospital outpatient clinic. PARTICIPANTS:
Seventy-seven community-dwelling ambulant persons with late effects of polio (42
men and 35 women; mean age 67 years [standard deviation 6, range 54-80]). MAIN
OUTCOME MEASURES: Physical activity was described by the Physical Activity and
Disability Survey and by a pedometer (number of steps/day). Isokinetic concentric
knee extensor and flexor muscle strength was measured at 60 degrees /s. Gait
performance was assessed by the Timed "Up and Go" test, the Comfortable Gait
Speed and Fast Gait Speed tests, and the 6-Minute Walk test. RESULTS: The
Physical Activity and Disability Survey leisure subscale was significantly
correlated with all knee muscle strength measurements (P < .01), the Comfortable
Gait Speed test (P < .05), and the 6-Minute Walk test (P < .05), and the number
of steps per day was significantly correlated with all knee muscle strength
measurements and all gait performance tests (P < .01). In the linear regression
analyses, knee muscle strength and gait performance explained 1% to 8% of the
variance in the leisure subscale, and when the personal attributes (age, gender,
and BMI) were added, they explained up to 14% of the variance. Knee muscle
strength explained 16% and gait performance explained 15% to 31% of the variance
in the number of steps per day, and when personal attributes (age, gender, and
BMI) were added, they contributed at most an additional 3% of the variance.
CONCLUSIONS: In ambulatory persons with late effects of polio, knee muscle
strength and gait performance explain only a small portion of physical activity.
Further studies are needed to increase our understanding of how other
impairments, activity limitations, environmental factors, and personal factors
are associated with physical activity in persons with late effects of polio.
CI - Copyright (c) 2015 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS