Submaximal-exercise-induced impairment of human muscle to develop and maintain force at low frequencies of electrical stimulation
(1995) In European Journal of Applied Physiology and Occupational Physiology 70(4). p.294-300- Abstract
- The aim of this study was to test the hypothesis that low intensity exercise-induced low frequency fatigue is caused by failure of excitation-contraction coupling. Changes in knee extension torque at 5, 10, 15, 20 and 50 Hz electrical stimulation of quadriceps muscle in ten healthy, young, male subjects were recorded during 20-min voluntary exercise followed by 60-min recovery. In seven of the ten subjects, changes in torque during 3 min of 10-Hz stimulation were recorded 2 min and 20 min after 20 min voluntary exercise. Exercise was performed at 30% of maximal voluntary contraction with a contraction plus relaxation period of 6 plus 4 s. Torque at 5, 10, 15, 20 and 50-Hz stimulation at the end of exercise was reduced to mean 91.0 (SEM... (More)
- The aim of this study was to test the hypothesis that low intensity exercise-induced low frequency fatigue is caused by failure of excitation-contraction coupling. Changes in knee extension torque at 5, 10, 15, 20 and 50 Hz electrical stimulation of quadriceps muscle in ten healthy, young, male subjects were recorded during 20-min voluntary exercise followed by 60-min recovery. In seven of the ten subjects, changes in torque during 3 min of 10-Hz stimulation were recorded 2 min and 20 min after 20 min voluntary exercise. Exercise was performed at 30% of maximal voluntary contraction with a contraction plus relaxation period of 6 plus 4 s. Torque at 5, 10, 15, 20 and 50-Hz stimulation at the end of exercise was reduced to mean 91.0 (SEM 5.4)%, 68.7 (SEM 5.4)%, 67.2 (SEM 3.9)%, 66.5 (SEM 4.5)% and 74.7 (SEM 4.3)% of control values, respectively. During the first 30 s of the 3 min 10-Hz stimulation, torque was reduced in exercised muscle and increased in nonfatigued muscle. The reduction in torque was more marked 20 min after exercise than after 2 min. In conclusion, the pattern of depression and recovery of muscle force observed was in agreement with the hypothesis that the main cause of low intensity exercise-induced low frequency fatigue is an impairment of excitation-contraction coupling. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1109536
- author
- Ratkevicius, A ; Skurvydas, A and Lexell, Jan LU
- organization
- publishing date
- 1995
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Electrical stimulation, Fatigue Muscle contraction, Muscles
- in
- European Journal of Applied Physiology and Occupational Physiology
- volume
- 70
- issue
- 4
- pages
- 294 - 300
- publisher
- Springer
- external identifiers
-
- pmid:7649139
- scopus:0029025137
- ISSN
- 0301-5548
- DOI
- 10.1007/BF00865025
- language
- English
- LU publication?
- yes
- id
- 1127d8f1-5ae4-4545-b9b3-85e9194c252a (old id 1109536)
- date added to LUP
- 2016-04-01 16:02:15
- date last changed
- 2021-02-07 06:16:39
@article{1127d8f1-5ae4-4545-b9b3-85e9194c252a,
abstract = {{The aim of this study was to test the hypothesis that low intensity exercise-induced low frequency fatigue is caused by failure of excitation-contraction coupling. Changes in knee extension torque at 5, 10, 15, 20 and 50 Hz electrical stimulation of quadriceps muscle in ten healthy, young, male subjects were recorded during 20-min voluntary exercise followed by 60-min recovery. In seven of the ten subjects, changes in torque during 3 min of 10-Hz stimulation were recorded 2 min and 20 min after 20 min voluntary exercise. Exercise was performed at 30% of maximal voluntary contraction with a contraction plus relaxation period of 6 plus 4 s. Torque at 5, 10, 15, 20 and 50-Hz stimulation at the end of exercise was reduced to mean 91.0 (SEM 5.4)%, 68.7 (SEM 5.4)%, 67.2 (SEM 3.9)%, 66.5 (SEM 4.5)% and 74.7 (SEM 4.3)% of control values, respectively. During the first 30 s of the 3 min 10-Hz stimulation, torque was reduced in exercised muscle and increased in nonfatigued muscle. The reduction in torque was more marked 20 min after exercise than after 2 min. In conclusion, the pattern of depression and recovery of muscle force observed was in agreement with the hypothesis that the main cause of low intensity exercise-induced low frequency fatigue is an impairment of excitation-contraction coupling.}},
author = {{Ratkevicius, A and Skurvydas, A and Lexell, Jan}},
issn = {{0301-5548}},
keywords = {{Electrical stimulation; Fatigue Muscle contraction; Muscles}},
language = {{eng}},
number = {{4}},
pages = {{294--300}},
publisher = {{Springer}},
series = {{European Journal of Applied Physiology and Occupational Physiology}},
title = {{Submaximal-exercise-induced impairment of human muscle to develop and maintain force at low frequencies of electrical stimulation}},
url = {{http://dx.doi.org/10.1007/BF00865025}},
doi = {{10.1007/BF00865025}},
volume = {{70}},
year = {{1995}},
}