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Spring-mass behavior and electromyographic activity evolution during a cycle-run test to exhaustion in triathletes
- Source :
- J Electromyogr Kinesiol, J Electromyogr Kinesiol, 2012, 22 (6), pp.835--844. ⟨10.1016/j.jelekin.2012.04.011⟩, Journal of Electromyography and Kinesiology, Journal of Electromyography and Kinesiology, Elsevier, 2012, 22 (6), pp.835-844. 〈10.1016/j.jelekin.2012.04.011〉
- Publication Year :
- 2012
- Publisher :
- HAL CCSD, 2012.
-
Abstract
- International audience; PURPOSE: To evaluate spring-mass (SM) behavior and associated electromyographic (EMG) activity during a run to exhaustion following a cycle exercise in trained triathletes. METHODS: Ten triathletes completed four tests: a cycling test to determine V˙O(2max); a running test to determine the lactate threshold (LT); a 5 min control run at LT (C-Run) followed after a total recovery period by a cycle-to-run session to exhaustion [30 min of cycling at ∼80% V˙O(2max) followed by a run until exhaustion at LT (T-Run)]. SM behavior and EMG signals in nine lower limb muscles were recorded throughout the running sessions. RESULTS: Immediately after cycling, leg stiffness was 12.1% higher than its C-Run value and a concomitant increase of EMG activity of knee extensors was observed during pre-contact. Throughout T-Run, leg stiffness decreased by 7.3%, while knee extensors and ankle flexors activities decreased during pre-contact and braking phases. No significant variations in SM parameters and no significant increase of muscle activity were reported between C-Run and the end of T-Run. CONCLUSION: SM behavior during the cycle-run test was consistent with EMG activity changes. Cessation of exercise was not associated with significant alterations of stiffness values and EMG activity.
- Subjects :
- Adult
medicine.medical_specialty
Physical Exertion
Biophysics
Neuroscience (miscellaneous)
Electromyography
Running
03 medical and health sciences
0302 clinical medicine
Physical medicine and rehabilitation
Oxygen Consumption
Heart Rate
Heart rate
[ SHS ] Humanities and Social Sciences
medicine
Humans
Cycle exercise
Lactic Acid
Muscle, Skeletal
ComputingMilieux_MISCELLANEOUS
Leg stiffness
medicine.diagnostic_test
Knee extensors
business.industry
Lactate threshold
030229 sport sciences
Skeletal
musculoskeletal system
Bicycling
body regions
medicine.anatomical_structure
Lower Extremity
Athletes
[ SHS.ANTHRO-BIO ] Humanities and Social Sciences/Biological anthropology
Physical therapy
Exercise Test
Muscle
Neurology (clinical)
Ankle
Cycling
business
030217 neurology & neurosurgery
[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Subjects
Details
- Language :
- English
- ISSN :
- 10506411
- Database :
- OpenAIRE
- Journal :
- J Electromyogr Kinesiol, J Electromyogr Kinesiol, 2012, 22 (6), pp.835--844. ⟨10.1016/j.jelekin.2012.04.011⟩, Journal of Electromyography and Kinesiology, Journal of Electromyography and Kinesiology, Elsevier, 2012, 22 (6), pp.835-844. 〈10.1016/j.jelekin.2012.04.011〉
- Accession number :
- edsair.doi.dedup.....7982b4c0f012b2ea5c6ca5afd410cff8