Damage to human muscle from eccentric exercise after training with concentric exercise

Damage to human muscle from eccentric exercise after training with concentric exercise 1 It is known that a period of eccentric exercise provides protection against damage to muscle from subsequent eccentric exercise. Here we ask, does concentric exercise do the opposite, make muscle more prone to damage? 2 The triceps surae muscle group of one leg in each of eight human subjects was subjected to 30 min of concentric exercise per day, for 5 days. At the end of the training period there was a small but significant increase in passive torque in the exercised muscle (P < 0.05), with no changes in the untrained muscle. 3 After a single period of eccentric exercise, angle‐torque curves for muscles of both legs shifted in the direction of longer muscle lengths, suggestive of an increase in series compliance. The shift in the concentrically trained muscle was significantly greater over the first 48 h post‐exercise (P < 0.05). 4 The volume of the trained leg increased significantly more than the untrained leg for five subjects over 72 h post‐exercise (P < 0.05). Peak torque fell, passive stiffness increased and both muscles became sore, but with no significant differences between the two legs. 5 It is concluded that a period of concentric exercise increases the susceptibility of muscle to changes associated with the damage from eccentric exercise. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Physiology Wiley

Damage to human muscle from eccentric exercise after training with concentric exercise

Loading next page...
 
/lp/wiley/damage-to-human-muscle-from-eccentric-exercise-after-training-with-eq8sFnz0l5
Publisher
Wiley
Copyright
Copyright © 1998 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0022-3751
eISSN
1469-7793
DOI
10.1111/j.1469-7793.1998.615be.x
Publisher site
See Article on Publisher Site

Abstract

1 It is known that a period of eccentric exercise provides protection against damage to muscle from subsequent eccentric exercise. Here we ask, does concentric exercise do the opposite, make muscle more prone to damage? 2 The triceps surae muscle group of one leg in each of eight human subjects was subjected to 30 min of concentric exercise per day, for 5 days. At the end of the training period there was a small but significant increase in passive torque in the exercised muscle (P < 0.05), with no changes in the untrained muscle. 3 After a single period of eccentric exercise, angle‐torque curves for muscles of both legs shifted in the direction of longer muscle lengths, suggestive of an increase in series compliance. The shift in the concentrically trained muscle was significantly greater over the first 48 h post‐exercise (P < 0.05). 4 The volume of the trained leg increased significantly more than the untrained leg for five subjects over 72 h post‐exercise (P < 0.05). Peak torque fell, passive stiffness increased and both muscles became sore, but with no significant differences between the two legs. 5 It is concluded that a period of concentric exercise increases the susceptibility of muscle to changes associated with the damage from eccentric exercise.

Journal

The Journal of PhysiologyWiley

Published: Oct 1, 1998

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month