Document Detail

Work Volume and Strength Training Responses to Resistive Exercise Improve with Periodic Heat Extraction from the Palm.
MedLine Citation:
PMID:  22076097     Owner:  NLM     Status:  Publisher    
Body core cooling via the palm of a hand increases work volume during resistive exercise. We asked: 1) is there a correlation between elevated core temperatures and fatigue onset during resistive exercise, and 2) does palm cooling between sets of resistive exercise affect strength and work volume training responses? Core temperature was manipulated by 30-45 min of fixed load and duration treadmill exercise in the heat with or without palm cooling. Work volume was then assessed by 4 sets of fixed load bench press exercises. Core temperatures were reduced and work volumes increased following palm cooling (Control: Tes=39.0±0.1°C, 36±7 reps vs. Cooling: Tes=38.4±0.2°C, 42±7 reps, mean±SD, n=8, p<0.001). In separate experiments the impact of palm cooling on work volume and strength training responses were assessed. Participants completed bi-weekly bench press or pull-up exercises for multiple successive weeks. Palm cooling was applied for 3 minutes between sets of exercise. Over three weeks of bench press training, palm cooling increased work volume by 40% (vs.13% with no treatment) (n=8, p<0.05). Over six weeks of pull-up training, palm cooling increased work volume by 144% in pull-up experienced subjects (vs. 5% over 2 weeks with no treatment) (n=7, p<0.001) and by 80% in pull-up naïve subjects (vs. 20% with no treatment) (n=11, p<0.01). Strength (1-RM) increased 22% over 10 weeks of pyramid bench press training (4 weeks with no treatment followed by 6 weeks with palm cooling) (n=10, p<0.001). These results verify previous observations about the effects of palm cooling on work volume, demonstrate a link between core temperature and fatigue onset during resistive exercise, and suggest a novel means for improving strength and work volume training responses.
Dennis A Grahn; Vinh H Cao; Christopher M Nguyen; Mengyuan T Liu; H Craig Heller
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-09
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Biology, Stanford University, Stanford, CA 94305.
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