Document Detail

Comparing muscle temperature during static and dynamic squatting with and without whole-body vibration.
MedLine Citation:
PMID:  20491843     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to investigate the influence of shallow dynamic squatting (DS) versus static squatting (SS) with or without concurrent side-to-side alternating whole-body vibration (WBV) on vastus lateralis temperature and cardiovascular stress as indicated by heart rate (HR). Ten participants (five men, five women) participated in four interventions [DS with WBV (DS+), DS without WBV (DS-), SS with WBV (SS+), SS without WBV (SS-)] 48 h apart, in a randomized order. The interventions were preceded by a approximately 20-min rest period, consisted of 10 mins with or without WBV (26 or 0 Hz) with SS (40 degrees of knee flexion) or DS (55 degrees of knee flexion, at a cadence of 50 bpm) where SS+ and DS- were metabolically matched. Muscle (T(m)), core (T(c)), skin temperature (T(sk)), HR and VO(2) were recorded during each intervention. For T(m), there was a time (P<0.01) and WBV (P<0.01) effect but no squat effect was evident, and there was time xWBV interaction effect (P<0.01). In all four interventions, the work load was too low to cause cardiovascular stress. Instead normal, moderate physiological effects of exercise on autonomic control were observed as indicated by HR; there were no significant increases in T(sk) or T(c). There appears to be no benefit in performing an unloaded, shallow DS+ at a tempo of 50 bpm as T(m,) HR, VO(2) are likely to be increased by the same amount and rate without WBV. However, combining SS with WBV could be advantageous to rapidly increasing soft tissue temperature prior to performing rehabilitation exercises when dynamic exercise cannot be performed.
D J Cochrane; S R Stannard; E C Firth; J Rittweger
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Publication Detail:
Type:  Comparative Study; Journal Article; Randomized Controlled Trial     Date:  2010-05-11
Journal Detail:
Title:  Clinical physiology and functional imaging     Volume:  30     ISSN:  1475-097X     ISO Abbreviation:  Clin Physiol Funct Imaging     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-07-28     Completed Date:  2010-11-08     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137604     Medline TA:  Clin Physiol Funct Imaging     Country:  England    
Other Details:
Languages:  eng     Pagination:  223-9     Citation Subset:  IM    
Sport Management and Coaching, Department of Management, Massey University, Palmerston North, New Zealand.
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MeSH Terms
Body Temperature*
Heart Rate
Muscle Contraction*
Oxygen Consumption
Quadriceps Muscle / physiology*
Skin Temperature
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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