Back to Search
Start Over
Individual Leg Muscle Contributions to the Cost of Walking: Effects of Age and Walking Speed
Individual Leg Muscle Contributions to the Cost of Walking: Effects of Age and Walking Speed
- Source :
- Journal of aging and physical activity. 25(2)
- Publication Year :
- 2016
-
Abstract
- This study examined the contributions of individual muscles to changes in energetic cost of transport (COT) over seven walking speeds, and compared results between healthy young and elderly subjects. Twenty six participants (13 young aged 18–30; 13 old aged 70–80) were recruited. COT (O2/kg body mass/km) was calculated by standardizing the mean oxygen consumption recorded during steady state walking. Electromyography signals from 10 leg muscles were used to calculate the cumulative activity required to traverse a unit of distance (CMAPD) for each muscle at each speed. In the old group CMAPD was correlated with COT, presented higher and more variable values, and showed greater increases around optimal speed for all studied muscles. Soleus CMAPD was independent of speed in the young group, but this was not evident with aging. Greater energy cost of walking in older individuals seems to be attributable to increased energy cost of all lower limb muscles.
- Subjects :
- Adult
medicine.medical_specialty
Adolescent
Energetic cost
Physical Therapy, Sports Therapy and Rehabilitation
Electromyography
Walking
Lower limb
Leg muscle
03 medical and health sciences
0302 clinical medicine
Surveys and Questionnaires
medicine
Humans
Muscle, Skeletal
Aged
Aged, 80 and over
Leg
medicine.diagnostic_test
business.industry
Rehabilitation
030229 sport sciences
Preferred walking speed
Energy cost
Physical therapy
Geriatrics and Gerontology
Young group
business
Energy Metabolism
Gerontology
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 1543267X
- Volume :
- 25
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of aging and physical activity
- Accession number :
- edsair.doi.dedup.....bdcacd6083f6c61b87883a0e73f59eaa