Journal of Applied Physiology Email Content Delivery
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 79: 2078-2085, 1995;
8750-7587/95 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Bourdin, M.
Right arrow Articles by Lacour, J. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Bourdin, M.
Right arrow Articles by Lacour, J. R.

Journal of Applied Physiology, Vol 79, Issue 6 2078-2085, Copyright © 1995 by American Physiological Society

ARTICLES

Effect of vertical loading on energy cost and kinematics of running in trained male subjects

M. Bourdin, A. Belli, L. M. Arsac, C. Bosco and J. R. Lacour
Laboratoire de Physiologie--Groupement d'Interet Public Exercise, Lyon-Sud, France.

This investigation examined, in a group of 10 trained male runners, the effect of vertical loading during level treadmill running at a velocity of 5 m/s. The net energy cost of running (Cr), the external work of the center of mass of the body (Wext; both expressed in J.kg-1.m-1), and the eccentric-to-concentric ratio (Ecc/Con) of integrated electromyographic activity for the vastus lateralis (VL) and gastrocnemius lateralis muscles were measured. It was observed that Wext and Ecc/Con for the VL could explain a large part of the interindividual variations in Cr. This result reinforces the hypothesis that Ecc/Con could be a good index of effectiveness in the stretch-shortening cycle. When the subjects ran with a vertical load of 9.3% of their body mass, Cr and Wext were significantly reduced (P < 0.01 and P < 0.05, respectively), whereas Ecc/Con for the VL and gastrocnemius lateralis remained unchanged. The variations in Cr and Wext due to vertical loading were significantly correlated (r = 0.75; P < 0.01). It was then concluded that the significant improvement of Cr observed with the added load was mainly due to the fact that Wext was significantly decreased.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
C. P. McGowan, H. A. Duarte, J. B. Main, and A. A. Biewener
Effects of load carrying on metabolic cost and hindlimb muscle dynamics in guinea fowl (Numida meleagris)
J Appl Physiol, October 1, 2006; 101(4): 1060 - 1069.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
R. L. Marsh, D. J. Ellerby, H. T. Henry, and J. Rubenson
The energetic costs of trunk and distal-limb loading during walking and running in guinea fowl Numida meleagris: I. Organismal metabolism and biomechanics
J. Exp. Biol., June 1, 2006; 209(11): 2050 - 2063.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. R. Modica and R. Kram
Metabolic energy and muscular activity required for leg swing in running
J Appl Physiol, June 1, 2005; 98(6): 2126 - 2131.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online