Viscoelastic creep in the human skeletal muscle-tendon unit.

Abstract:

:The purposes of the present study were to (1) characterize viscoelastic creep in vivo in the human skeletal muscle-tendon unit and (2) to examine the consistency of these responses during a single 30-s stretch. Twelve volunteers (mean +/- SD = 22 +/- 3 years; height = 169 +/- 11 cm; mass = 70 +/- 17 kg) participated in two separate experimental trials. Each trial consisted of a 30-s constant-torque stretch of the plantar flexor muscles. Position (degrees) values were quantified at every 5-s period (0, 5, 10, 15, 20, 25, and 30 s) and the percent change in position was quantified for each 5-s epoch (0-5, 5-10, 10-15, 15-20, 20-25, and 25-30 s) relative to the total increase in the range of motion. In addition, the intraclass correlation coefficient (ICC) and standard errors of the measurement (SEM) were calculated for test-retest reliability. These results indicated that position increased over the entire 30-s stretch (P < 0.05), while the majority of the increases in position (73-85%) occurred during the first 15-20 s. ICC values were >or = 0.994 and SEM values (expressed as percentage of the mean) were

journal_name

Eur J Appl Physiol

authors

Ryan ED,Herda TJ,Costa PB,Walter AA,Hoge KM,Stout JR,Cramer JT

doi

10.1007/s00421-009-1284-2

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

207-11

issue

1

eissn

1439-6319

issn

1439-6327

journal_volume

108

pub_type

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