Document Detail


Palm cooling delays fatigue during high-intensity bench press exercise.
MedLine Citation:
PMID:  20139781     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Local cooling can induce an ergogenic effect during a short-term intense exercise. One proposed method of personal cooling involves heat extraction from the palm. PURPOSE: In this study, we hypothesized that local palm cooling (PC) during rest intervals between progressive weight training sets will increase total repetitions and exercise volume in resistance-trained subjects exercising in a thermoneutral (TN) environment. METHODS: Sixteen male subjects (mean +/- SD; age = 26 +/- 6 yr, height = 178 +/- 7 cm, body mass = 81.5 +/- 11.3 kg, one-repetition maximum (1RM) bench press = 123.5 +/- 12.6 kg, weight training experience = 10 +/- 6 yr) performed four sets of 85% 1RM bench press exercise to fatigue, with 3-min rest intervals. Exercise trials were performed in a counterbalanced order for 3 d, separated by at least 3 d: TN, palm heating (PH), and PC. Heating and cooling were applied by placing the hand in a device called the rapid thermal exchanger, set to 45 degrees C for heating or 10 degrees C for cooling. This device heats or cools the palm while negative pressure (-35 to -45 mm Hg) is applied around the hand. RESULTS: Total exercise volume during the four PC sets (2480 +/- 636 kg) was significantly higher than that during TN (1972 +/- 632 kg) and PH sets (2156 +/- 668 kg, P < 0.01). The RMS of the surface EMG with PC exercise was higher (P < 0.01), whereas esophageal temperature (P < 0.05) and RPE (P < 0.05) were lower during PC compared with TN and PH. CONCLUSIONS: PC from 35 degrees C to 20 degrees C temporarily overrides fatigue mechanism(s) during intense intermittent resistance exercise. The mechanisms for this ergogenic function remain unknown.
Authors:
Young Sub Kwon; Robert A Robergs; Len R Kravitz; Burke A Gurney; Christine M Mermier; Suzanne M Schneider
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  42     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-20     Completed Date:  2010-11-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1557-65     Citation Subset:  IM; S    
Affiliation:
Department of Health, Exercise & Sports Sciences, University of New Mexico, Albuquerque, 87131-0001, USA. youngsubkwon@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Adult
Body Temperature / physiology*
Cold Temperature
Esophagus / physiology
Hand / physiology*
Humans
Immersion
Male
Muscle Fatigue / physiology*
Muscle Strength / physiology
Muscle, Skeletal / physiology
Physical Endurance / physiology
Resistance Training
Weight Lifting
Young Adult

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


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