Brenda Jeng1, Katie L Cederberg1, Byron Lai1, Jeffer E Sasaki2, Marcas M Bamman3,4,5, Robert W Motl1,3. 1. Department of Physical Therapy, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA. 2. Graduate Program in Physical Education, Federal University of Triângulo Mineiro, Uberaba, Brazil. 3. UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, AL, USA. 4. Departments of Cell, Developmental, and Integrative Biology; Medicine; and Neurology, University of Alabama at Birmingham, Birmingham, AL, USA. 5. Geriatric Research, Education, and Clinical Center, Birmingham VA Medical Center, Birmingham, AL, USA.
Abstract
OBJECTIVES: To examine the relationship between step-rate and energy expenditure during treadmill walking in persons with PD and then further develop a step-rate cut-point for moderate-to-vigorous physical activity (MVPA) for persons with PD. MATERIALS AND METHODS: The sample consisted of 30 persons with mild-to-moderate PD and 30 controls matched by age and sex. Participants performed a 6-minute bout of over-ground walking at comfortable speed, and then completed three, 6-minute bouts of treadmill walking at 13.4 m/min slower, comfortable, and 13.4 m/min faster than comfortable speeds. The three treadmill speeds were based on the initial over-ground walking speed. The total number of steps per treadmill walking bout was recorded using a hand-tally counter, and energy expenditure was measured using a portable, indirect spirometry system. RESULTS: The results indicated a strong association between step-rate and energy expenditure for persons with PD (R2 = .92) and controls (R2 = .92). The analyses further indicated a steeper slope of the association for persons with PD compared with controls (t(58) = -1.87, P < .05), resulting in a lower step-rate threshold (t(58) = 2.19, P < .05) for persons with PD (~80 steps·per minutes) than controls (~93 steps·per minutes). CONCLUSION: Collectively, these results support the application of this disease-specific step-rate threshold for MVPA among persons with PD. This has important implications for physical activity promotion, prescription, and monitoring using accelerometers and pedometers for persons with PD to manage health and symptoms of PD.
OBJECTIVES: To examine the relationship between step-rate and energy expenditure during treadmill walking in persons with PD and then further develop a step-rate cut-point for moderate-to-vigorous physical activity (MVPA) for persons with PD. MATERIALS AND METHODS: The sample consisted of 30 persons with mild-to-moderate PD and 30 controls matched by age and sex. Participants performed a 6-minute bout of over-ground walking at comfortable speed, and then completed three, 6-minute bouts of treadmill walking at 13.4 m/min slower, comfortable, and 13.4 m/min faster than comfortable speeds. The three treadmill speeds were based on the initial over-ground walking speed. The total number of steps per treadmill walking bout was recorded using a hand-tally counter, and energy expenditure was measured using a portable, indirect spirometry system. RESULTS: The results indicated a strong association between step-rate and energy expenditure for persons with PD (R2 = .92) and controls (R2 = .92). The analyses further indicated a steeper slope of the association for persons with PD compared with controls (t(58) = -1.87, P < .05), resulting in a lower step-rate threshold (t(58) = 2.19, P < .05) for persons with PD (~80 steps·per minutes) than controls (~93 steps·per minutes). CONCLUSION: Collectively, these results support the application of this disease-specific step-rate threshold for MVPA among persons with PD. This has important implications for physical activity promotion, prescription, and monitoring using accelerometers and pedometers for persons with PD to manage health and symptoms of PD.
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Authors: Marlies van Nimwegen; Arlène D Speelman; Esther J M Hofman-van Rossum; Sebastiaan Overeem; Dorly J H Deeg; George F Borm; Marleen H L van der Horst; Bastiaan R Bloem; Marten Munneke Journal: J Neurol Date: 2011-05-26 Impact factor: 4.849
Authors: Byron Lai; Jeffer E Sasaki; Brenda Jeng; Katie L Cederberg; Marcas M Bamman; Robert W Motl Journal: JMIR Rehabil Assist Technol Date: 2020-01-16