NDLI: Voluntary activation of the ankle plantar flexors following whole-body vibration

Content Provider	Springer Nature Link
Author	Pellegrini, Michael J. Lythgo, el D. Morgan, David L. Galea, Mary P.
Copyright Year	2009
Abstract	This study investigated the effect of whole-body vibration (WBV) on the voluntary activation of the ankle plantar flexors. Twelve healthy young adults were randomly exposed to two treatments on separate occasions. The first (non-WBV) involved stretching of the plantar flexors at end range of dorsiflexion for five 1-min bouts. The second involved the same stretch with WBV (26 Hz) for five 1-min bouts. Attempted maximal voluntary contractions (AMVCs) of the plantar flexors were performed on an isokinetic dynamometer (30° s−1) before and after each treatment. A twitch interpolation technique was used to investigate voluntary activation. Post-treatment data were normalised against pre-treatment data. Subjects were classified as maximally (n = 6) or sub-maximally (n = 6) activated using the pre-treatment twitch interpolation data. The effects of WBV were assessed by repeated measure (RM) MANOVA. After WBV, the group of subjects classified as sub-maximally activated increased peak voluntary torque and rate of voluntary torque production (P < 0.05), whereas angular displacement to peak torque reduced (P < 0.05); i.e. peak torque was produced at a longer muscle length. No significant non-WBV treatment effects were found for this group. No significant WBV effects were found for the group of subjects classified as maximally activated. This study found that the response to WBV was dependent on the level of voluntary activation of the ankle plantar flexors during a set of AMVCs.
Starting Page	927
Ending Page	934
Page Count	8
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	108
Issue Number	5
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-11-28
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dynamometer Isokinetic Torque Twitch interpolation Vibration Plantar flexors Sports Medicine Occupational Medicine/Industrial Medicine Human Physiology
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Assessment of plantar flexors activation capacity: nerve versus muscle stimulation by single versus double pulse

Conventionally assessed voluntary activation does not represent relative voluntary torque production

Effect of muscle length on voluntary activation of the plantar flexors in boys and men

Effects of 17 days bedrest on the maximal voluntary isometric torque and neuromuscular activation of the plantar and dorsal flexors of the ankle

Enhanced precision of ankle torque measure with an open-unit dynamometer mounted with a 3D force-torque sensor

Fatiguing handgrip exercise alters maximal force-generating capacity of plantar-flexors

Acute whole-body vibration elicits post-activation potentiation

Comparison of maximal unilateral versus bilateral voluntary contraction force

Assessment of voluntary muscle activation using magnetic stimulation

Voluntary activation of the ankle plantar flexors following whole-body vibration

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