Document Detail

Dynamics of viscoelastic creep during repeated stretches.
MedLine Citation:
PMID:  21362058     Owner:  NLM     Status:  Publisher    
The present study examined the viscoelastic creep responses in vivo during repeated constant-torque stretches in human skeletal muscle. Twelve healthy participants completed four consecutive 30-s constant-torque passive stretches of the right plantar flexor muscles. Position and surface electromyographic (EMG) amplitude values were quantified at every 5-s period and the percent change in position was quantified for each 5-s epoch relative to the total increase in ankle joint position for each stretch. In addition, the absolute changes in position were plotted on a logarithmic time scale and fit with a linear regression line to examine both the rate of increase (slope) and the overall increase in position over the entire stretch (y-intercept). The percent change and slope were similar (P>0.05) over all four stretches, with the majority of increases in position occurring within the initial 15-20 s of each stretch (84%). Absolute ankle joint position and the y-intercept increased (P<0.05) following both the first and second stretch but plateaued (P>0.05) after the third stretch. In addition, EMG amplitude values did not change (P>0.05) during or between each 30-s stretch. These data indicate that the amount and rate of viscoelastic creep were similar during practical durations of constant-torque stretching despite no change in ankle joint position following three 30-s stretches.
E D Ryan; T J Herda; P B Costa; A A Walter; J T Cramer
Related Documents :
15668528 - Increased amplitudes of distortion product otoacoustic emissions in patients with unila...
7432058 - Anatomical studies of the posterior petrous apex with regard to hearing preservation in...
21376628 - Neuromuscular fatigue induced by alternating isometric contractions of the ankle planta...
3227638 - Total ear canal ablation combined with lateral bulla osteotomy for end-stage otitis in ...
953868 - The effect of metoclopramide on intestinal muscle responses and the peristaltic reflex ...
4420758 - On the repetitive discharge in myotonic muscle fibres.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-1
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  -     ISSN:  1600-0838     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 John Wiley & Sons A/S.
Applied Musculoskeletal and Human Physiology Laboratory, Department of Health and Human Performance, Oklahoma State University, Stillwater, Oklahoma, USA Biophysics Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Effects of resistance training on matrix metalloproteinase-2 activity and biomechanical and physical...
Next Document:  Experimental and numerical study on the mechanical behavior of the superficial layers of the face.