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Standing Neurophysiological Assessment of Lower Extremity Muscles Post-Stroke
Published on: July 26, 2021
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Skeletal muscle metabolism after stroke: A comparative study using treadmill and overground walking test
Ana Paula C Loureiro1, Birgitta Langhammer, Terje Gjøvaag
1Department of Physical Therapy, Pontifícia Universidade Católica do Paraná - School of Life Sciences, 80215-901 Curitiba, Brasil. anna.loureiro@gmail.com.
Journal of Rehabilitation Medicine
|June 30, 2017
Summary
Stroke survivors primarily use carbohydrates for energy during walking, which is linked to reduced daily activity and increased fatigue. Understanding this muscle metabolism is key for improving post-stroke recovery and mobility.
Area of Science:
- Exercise Physiology
- Neurorehabilitation
- Metabolic Studies
Background:
- Stroke survivors often experience impaired mobility and reduced physical activity.
- Muscle metabolism and energy utilization during locomotion are critical factors in post-stroke recovery.
Purpose of the Study:
- To investigate muscle metabolism, specifically fat and carbohydrate oxidation, during walking in stroke survivors.
- To determine the relationship between energy source utilization during walking and daily physical activity patterns and fatigue levels in post-stroke individuals.
Main Methods:
- Measured respiratory exchange ratio, oxygen consumption, and carbon dioxide production in 28 stroke survivors and 10 controls during treadmill and overground walking.
- Utilized uniaxial accelerometers (activPAL™) for 4-day physical activity monitoring.
- Assessed Human Activity Profile and Neurological Fatigue Index in participants.
Main Results:
- Stroke survivors predominantly oxidized carbohydrates (55-66%) during preferred-speed walking compared to controls (47-50%).
- Higher carbohydrate oxidation correlated with lower Human Activity Profile scores, fewer daily steps (4,422 vs. 6,692), and increased fatigue.
Conclusions:
- Carbohydrate oxidation is the primary fuel source during preferred walking speed in post-stroke individuals.
- Altered energy metabolism, specifically increased carbohydrate utilization, may negatively impact physical activity levels and contribute to fatigue in stroke survivors.
