ACCELEROMETER-DETERMINED INTENSITY AND DURATION OF HABITUAL PHYSICAL ACTIVITY AND WALKING PERFORMANCE IN WELL-FUNCTIONING MIDDLE-AGED AND OLDER WOMEN: A CROSS-SECTIONAL STUDY
| Autor: | Takashi Abe, Jeremy P. Loenneke, M. Ogawa, Robert S. Thiebaud, Naotoshi Mitsukawa |
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| Rok vydání: | 2019 |
| Předmět: |
medicine.medical_specialty
Time Factors Cross-sectional study Physical activity Accelerometer Habits 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Accelerometry medicine Humans 030212 general & internal medicine Exercise Aged business.industry 030229 sport sciences General Medicine Middle Aged Physical Functional Performance Walking Speed Intensity (physics) Preferred walking speed Cross-Sectional Studies Duration (music) Exercise intensity Female Multiple linear regression analysis business human activities |
| Zdroj: | Journal of Frailty & Aging. :1-5 |
| ISSN: | 2273-4309 |
| DOI: | 10.14283/jfa.2019.26 |
| Popis: | ackground: The association of physical activity (PA) intensities and duration spent in those activities with different walking tasks remains unclear. Objectives: To examine the association between the duration of PA intensities and three walking speeds (usual walking speed, maximal walking speed and zig-zag walking speed). Design: Multiple linear regression analysis was used to estimate the association of age, BMI, maximum knee extension strength, light PA, moderate PA and vigorous PA with walking speeds. Setting: University lab. Participants: Eighty-six older women (67 ± 7 years). Measurements: PA was measured for 30 consecutive days using the Lifecorder-EX accelerometer. Exercise intensity was categorized as light (levels 1-3), moderate (levels 4-6) and vigorous (levels 7-9) based on the manufacturer algorithms. Usual straight walking speed (20 m), maximal straight walking speed (20 m) and zig-zag walking speed tests (10 m) were performed by each participant. Results: For the usual straight walking speed model (R2 = 0.296, SEE = 0.15 m/s), the significant predictors were BMI, knee extension strength, light PA and vigorous PA. For the maximal straight walking speed model (R2 = 0.326, SEE = 0.20 m/s), only age was a significant predictor. For the zig-zag walking speed model (R2=0.417, SEE = 0.14 m/s), age and maximum knee strength were significant predictors in the model. Conclusions: Overall, the results of this study suggest that vigorous PA and maximal knee extension strength are two important factors that are associated with different walking speeds in older women. |
| Databáze: | OpenAIRE |
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