alexa Increased Energy Cost of Mobility in Chronic Stroke
ISSN: 2167-7182

Journal of Gerontology & Geriatric Research
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Research Article

Increased Energy Cost of Mobility in Chronic Stroke

Monica C Serra1,2, Margarita S Treuth3, Charlene E Hafer-Macko4,5 and Alice S Ryan1,2*

1Baltimore VA Research Service, USA

2Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Maryland School of Medicine, USA

3Department of Kinesiology, University of Maryland Eastern Shore, USA

4Department of Neurology, University of Maryland School of Medicine, USA

5Baltimore Geriatric Research Education and Clinical Centers, USA

*Corresponding Author:
Alice S Ryan
Division of Gerontology and Geriatric Medicine
Geriatric Research, Education and Clinical Center
Baltimore Veterans Affairs Medical Center
Baltimore, MD 21201, USA
Tel: 4106057851
Fax: 4106057913
E-mail: [email protected]

Received Date: October 04, 2016; Accepted Date: October 19, 2016; Published Date: October 22, 2016

Citation: Serra MC, Treuth MS, Hafer-Macko CE, Ryan AS (2016) Increased Energy Cost of Mobility in Chronic Stroke. J Gerontol Geriatr Res 5:356. doi:10.4172/2167-7182.1000356

Copyright: © 2016 Serra MC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



The purpose of this study was to compare the energy cost of completing mobility-related activities in chronic stroke to the estimated energy cost found in the compendium of physical activities, a resource that estimates and classifies energy cost of various human physical activities. Men (n=18) and women (n=10) with chronic hemiparetic gait (stroke latency: 4 ± 2 years, age: 60.4 ± 1.6 years, BMI: 31.5 ± 1.1 kg/m2) participated in the study. Portable energy cost monitoring (COSMED K4b2) was performed during five mobility activities of varying intensity to determine metabolic equivalents (METs, or oxygen consumption in multiples of resting level) for each activity. The METs achieved during the five activities were compared to the following compendium MET values for: 1) floor sweeping; 2) stepping in place; 3) over-ground walking; 4) lower speed treadmill walking (1.0 mph at 4% incline); and 5) higher speed treadmill walking (2.0 mph at 4% incline). Measurements were obtained for 10 min at rest and 5 minutes during each of the five activities. The energy cost of rest was only 85% of Compendium METS, while mobility-related activities were ~1.25-1.50 fold greater when measured in stroke vs. Compendium METS for all measures (P’s<0.05), except floor sweeping, which was similar between groups. These data indicate that MET levels provided in the compendium are not applicable to chronic stroke survivors as they overestimate energy expenditure at rest and underestimate energy expenditure during physical activity, indicating poor efficiency in movement, thus elevating the oxygen cost of completing general daily activities.

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