当前位置： SCI文献检索 > JOURNAL OF SPORTS SCIENCES期刊下所有文献 > Changes in transverse relaxation time of quadriceps femoris muscles after active recovery exercises with different intensities.

Changes in transverse relaxation time of quadriceps femoris muscles after active recovery exercises with different intensities.

Abstract：

:The purpose of this study was to examine the changes in the metabolic state of quadriceps femoris muscles using transverse relaxation time (T2), measured by muscle functional magnetic resonance (MR) imaging, after inactive or active recovery exercises with different intensities following high-intensity knee-extension exercise. Eight healthy men performed recovery sessions with four different conditions for 20 min after high-intensity knee-extension exercise on separate days. During the recovery session, the participants conducted a light cycle exercise for 20 min using a cycle (50%, 70% and 100% of the lactate threshold (LT), respectively: active recovery), and inactive recovery. The MR images of quadriceps femoris muscles were taken before the trial and after the recovery session every 30 min for 120 min. The percentage changes in T2 for the rectus femoris and vastus medialis muscles after the recovery session in 50% LT and 70% LT were significantly lower than those in either inactive recovery or 100% LT. There were no significant differences in those for vastus lateralis and vastus intermedius muscles among the four trials. The percentage changes in T2 of rectus femoris and vastus medialis muscles after the recovery session in 50% LT and 70% LT decreased to the values before the trial faster than those in either inactive recovery or 100% LT. Those of vastus lateralis and vastus intermedius muscles after the recovery session in 50% LT and 70% LT decreased to the values before the trial faster than those in 100% LT. Although the changes in T2 after active recovery exercises were not uniform in exercised muscles, the results of this study suggest that active recovery exercise with the intensities below LT are more effective to recover the metabolic state of quadriceps femoris muscles after intense exercise than with either intensity at LT or inactive recovery.

journal_name

J Sports Sci

journal_title

Journal of sports sciences

authors

Mukaimoto T,Semba S,Inoue Y,Ohno M

doi

10.1080/02640414.2013.855803

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

766-75

issue

eissn

0264-0414

issn

1466-447X

journal_volume

pub_type

杂志文章

在线工具

Changes in transverse relaxation time of quadriceps femoris muscles after active recovery exercises with different intensities.