Advanced

Submaximal-exercise-induced impairment of human muscle to develop and maintain force at low frequencies of electrical stimulation

Ratkevicius, A; Skurvydas, A and Lexell, Jan LU (1995) In European Journal of Applied Physiology and Occupational Physiology1973-01-01+01:001999-01-01+01:00 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:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electrical stimulation, Fatigue Muscle contraction, Muscles
in
European Journal of Applied Physiology and Occupational Physiology1973-01-01+01:001999-01-01+01:00
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
2008-07-28 16:36:41
date last changed
2018-05-29 12:06:48
@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},
  keyword      = {Electrical stimulation,Fatigue Muscle contraction,Muscles},
  language     = {eng},
  number       = {4},
  pages        = {294--300},
  publisher    = {Springer},
  series       = {European Journal of Applied Physiology and Occupational Physiology1973-01-01+01:001999-01-01+01:00},
  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},
  volume       = {70},
  year         = {1995},
}