Differential expression of muscle damage in humans following acute fast and slow velocity eccentric exercise

Paddon-Jones, D., Keech, A., Lonergan, A. and Abernethy, P. (2005) Differential expression of muscle damage in humans following acute fast and slow velocity eccentric exercise. Journal of Science And Medicine In Sport, 8 3: 255-263. doi:10.1016/S1440-2440(05)80036-2


Author Paddon-Jones, D.
Keech, A.
Lonergan, A.
Abernethy, P.
Title Differential expression of muscle damage in humans following acute fast and slow velocity eccentric exercise
Journal name Journal of Science And Medicine In Sport   Check publisher's open access policy
ISSN 1440-2440
Publication date 2005-08
Sub-type Article (original research)
DOI 10.1016/S1440-2440(05)80036-2
Volume 8
Issue 3
Start page 255
End page 263
Total pages 9
Editor B. Abernethy
Place of publication Dickson, ACT
Publisher Sports Medicine Australia
Collection year 2005
Language eng
Subject C1
321401 Exercise Physiology
730220 Injury control
Abstract We sought to determine if the velocity of an acute bout of eccentric contractions influenced the duration and severity of several common indirect markers of muscle damage. Subjects performed 36 maximal fast (FST, n=8: 3.14 rad center dot s(-1)) or slow (SLW, n=7: 0.52 rad center dot s(-1)) velocity isokinetic eccentric contractions with the elbow flexors of the non-dominant arm. Muscle soreness, limb girth, plasma creatine kinase (CK) activity, isometric torque and concentric and eccentric torque at 0.52 and 3.14 rad center dot s(-1) were assessed prior to and for several days following the eccentric bout. Peak plasma CK activity was similar in SLW (4030 +/- 1029 U center dot l(-1)) and FST (5864 +/- 2664 U center dot l(-1)) groups, (p > 0.05). Both groups experienced similar decrement in all strength variables during the 48 hr following the eccentric bout. However, recovery occurred more rapidly in the FST group during eccentric (0.52 and 3.14 rad center dot s(-1)) and concentric (3.14 rad center dot s(-1)) post-testing. The severity of muscle soreness was similar in both groups. However, the FST group experienced peak muscle soreness 48 hr later than the SLW group (24 hr vs. 72 hr). The SLW group experienced a greater increase in upper arm girth than the FST group 20 min, 24 hr and 96 hr following the eccentric exercise bout. The contraction velocity of an acute bout of eccentric exercise differentially influences the magnitude and time course of several indirect markers of muscle damage.
Keyword Sport Sciences
Morphological-changes
Repeated Bouts
Inflammation
Adaptation
Soreness
Force
Activation
Symptoms
Females
Males
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 05:48:17 EST