Muscle oxygenation of vastus lateralis and medialis muscles during alternating and pulsed current electrical stimulation

Aldayel, Abdulaziz, Muthalib, Makii, Jubeau, Marc, McGuigan, Michael and Nosaka, Kazunori 2011, Muscle oxygenation of vastus lateralis and medialis muscles during alternating and pulsed current electrical stimulation, European journal of applied physiology, vol. 111, no. 5, pp. 779-787, doi: 10.1007/s00421-010-1699-9.

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Title Muscle oxygenation of vastus lateralis and medialis muscles during alternating and pulsed current electrical stimulation
Author(s) Aldayel, Abdulaziz
Muthalib, Makii
Jubeau, Marc
McGuigan, Michael
Nosaka, Kazunori
Journal name European journal of applied physiology
Volume number 111
Issue number 5
Start page 779
End page 787
Total pages 9
Publisher Springer
Place of publication Heidelberg, Germany
Publication date 2011-05
ISSN 1439-6319
Keyword(s) neuromuscular electrical stimulation
near-infrared spectroscopy
blood flow
motor unit recruitment
isometric contractions
Electric Stimulation
Middle Aged
Oxygen Consumption
Quadriceps Muscle
Summary This study compared between alternating and pulsed current electrical muscle stimulation (EMS) for muscle oxygenation and blood volume during isometric contractions. Nine healthy men (23-48 years) received alternating current EMS (2500 Hz) modulated at 75 Hz on the knee extensors of one leg, and pulsed current EMS (75 Hz) for the other leg separated by 2 weeks in a randomised, counter-balanced order. Pulse duration (400 μs), on-off ratio (5-15 s) and other stimulation parameters were matched between conditions and 30 isometric contractions were induced at the knee joint angle of 100° (0° full extension). Changes in tissue oxygenation index (∆TOI) and total hemoglobin volume (∆tHb) of vastus lateralis and medialis muscles over 30 contractions were assessed by a near-infrared spectroscopy, and were compared between conditions by a two-way repeated measures ANOVA. Peak torque produced during EMS increased over 30 contractions in response to the increase in the stimulation intensity for pulsed current, but not for the alternating current EMS. The torque during each isometric contraction was less stable in alternating than pulsed current EMS. The changes in ∆TOI amplitude during relaxation phases and ∆tHb amplitude were not significantly different between conditions. However, the decreases in ∆TOI amplitude during contraction phases from baseline were significantly (P < 0.05) greater for the pulsed current than alternating current from the 18th contraction (-15.6 ± 2.3 vs. -8.9 ± 1.8%) to 30th contraction (-10.7 ± 1.8 vs. -4.8 ± 1.5%). These results suggest that the muscles were less activated in the alternating current EMS when compared with the pulsed current EMS.
Language eng
DOI 10.1007/s00421-010-1699-9
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
1106 Human Movement And Sports Science
Socio Economic Objective 920116 Skeletal System and Disorders (incl. Arthritis)
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2010, Springer
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