Document Detail


Chronic stretching and voluntary muscle force.
MedLine Citation:
PMID:  18550978     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of the study was to determine whether muscle force, power, and optimal length were affected by 4 weeks of static or ballistic stretching. Twenty-nine males (age, 18-60 years) performed 4 maximal hip extensions to measure peak torque (PT), rate of torque development (RTD), work (W), and PT angle (PTA). Then, participants completed 4 weeks of static or ballistic flexibility training of the hip extensors followed by repetition of the testing protocol. After training, PT increased 5.3 +/- 19.0% in the static group (SG), 7.8 +/- 12.7% in the ballistic group (BG), and 6.1 +/- 17.9% in the control group (CG). RTD increased 4.8 +/- 22.7% in the SG, 3.6 +/- 28.0% in the BG and 9.7 +/- 24.0% in the CG. W increased 3.9 +/- 7.0% in the SG, 14.7 +/- 27.4% in the BG, and 5.5 +/- 9.5% in the CG. PTA changed little with a -1.6 +/- 6.6% decrease in the SG and increases of 0.86 +/- 4.1% in the BG and 0.18 +/- 8.7% in the CG. None of the results were statistically different between stretching group and CG (alpha = 0.05). These data suggest that 4 weeks of stretching have little effect on muscle strength, power, W, or length-tension relationship. PTA changed little, suggesting that a lengthening of the muscle with stretching did not occur. It is suggested that individuals can routinely stretch following exercise to maintain flexibility but should avoid stretching prior to exercise requiring high levels of muscle force. Before exercise that requires high muscular forces, individuals may perform dynamic, sport-specific exercises to increase blood flow, metabolic activity, temperature, and compliance of the muscle.
Authors:
Dain P LaRoche; Mélanie V Lussier; Stephen J Roy
Related Documents :
19212898 - Can vastus medialis oblique be preferentially activated? a systematic review of electro...
21271498 - First reported cases of exercise-associated hyponatremia in asia.
17719798 - Effects of repeated ankle plantar-flexions on h-reflex and body sway during standing.
11742448 - A novel constrained acetabular liner design with increased range of motion.
7272198 - An analysis of submaximal exercise responses in patients with sarcoidosis and fibrosing...
18317298 - Pixel-by-pixel mean transit time without deconvolution.
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  22     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-06-13     Completed Date:  2008-09-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  589-96     Citation Subset:  IM    
Affiliation:
Department of Kinesiology, University of New Hampshire, Durham, New Hampshire, USA. dain.laroche@unh.edu
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Hip / physiology
Humans
Male
Middle Aged
Muscle Strength / physiology*
Muscle Strength Dynamometer
Muscle Stretching Exercises / methods*
Muscle, Skeletal / physiology
Torque
Grant Support
ID/Acronym/Agency:
P20 RR16462/RR/NCRR NIH HHS

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


Previous Document:  Concurrent validity of four clinical tests used to measure hamstring flexibility.
Next Document:  Comparison of responses to strenuous eccentric exercise of the elbow flexors between resistance-trai...