Home Current Issue Previous Issues Published Ahead-of-Print Collections For Authors Journal Info
Skip Navigation LinksHome > December 1997 - Volume 29 - Issue 12 > Muscular adaptation and strength during the early phase of e...
Medicine & Science in Sports & Exercise:
Applied Sciences: Physical Fitness and Performance

Muscular adaptation and strength during the early phase of eccentric training: influence of the training frequency

SORICHTER, STEPHAN; MAIR, JOHANNES; KOLLER, ARNOLD; SECNIK, PETER; PARRAK, VOJTECH; HAID, CHRISTIAN; MÜLLER, ERICH; PUSCHENDORF, BERND

Collapse Box

Abstract

Muscular adaptation and strength during the early phase of eccentric training: influence of the training frequency. Med. Sci. Sports Exerc., Vol. 29, No. 12, pp. 1646-1652, 1997. We investigated the effects of different training frequencies on maximum isometric voluntary contraction(MVC) force and plasma concentrations of muscle proteins during the early phase of eccentric training. MVC and plasma concentrations of creatine kinase(CK) and slow-twitch skeletal (cardiac beta-type) myosin heavy chain (MHC) fragments were measured before and 4 and 7 d after performing the first and last training task. Training tasks, which comprised 70 high-force eccentric contractions involving the thigh muscles (single leg), were performed under supervision in three groups (A, B, C) at the beginning and at the end of the study period (7 wk). In addition, groups A (N = 10) and B(N = 10) trained during the study period starting 1 wk after the first training task. Group A performed one training task once a week for 5 wk and group B (N = 10) twice a week for 2 wk and three times a week during the subsequent 3 wk. In all three groups the first training task resulted in delayed CK and MHC peaks and decrements in MVC, which were comparable (P > 0.05). Only training regimen B resulted in a significant increase in the MVC. Compared with the first training task training regimens, A and B significantly (P < 0.01) reduced the increase in serum muscle protein and muscle function impairment. The responses to the last training task did not differ significantly between groups A and B. In group C the responses after the second training task did not differ significantly from those observed after the first task. Our results suggest that, compared with group A, additional eccentric exercise in group B is the essential basis for the increase in muscle strength during the early phase of eccentric training without further benefits for muscular adaptation. In group C we found no muscular adaptation.

©1997The American College of Sports Medicine

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.

Connect With Us