Earticle

초록

영어

In the present study, we investigated the effects of previous strength training and retraining following long-term cessation of exercise on muscle mass and contractile properties. Female Sprague-Dawley rats (n=24) aged eight weeks were randomly assigned one of the four groups: control (CON), detraining (DT), training (TR), and retraining (RT). The training regimen consisted of climbing ladder 5×3 sets, once every third day for eight weeks with weight attached to the tail. The weight carried during each training session was initially 50% of body weight and progressively increased by 10% per session. The rats in DT were detained for 20 weeks followed by eight weeks strength training. The rats in the both TR and RT groups underwent eight weeks training. DT was age matched new training group while RT was retraining group af-ter 20 weeks of detraining. Soleus, gastrocnemius, tibialis anterior, and flexor hallucis longus (FHL) muscles were harvested in order to mea-sure the weight, and in situ contractile properties of FHL were mea-sured including specific twitch tension (Spt) and specific tetanic tension (Spo). TR showed significant increase in muscle mass compared to CON (P<0.05). DT and RT showed significant increase in muscle mass when compared to all other groups (P<0.05). There was no statistical difference in Spt and Spo among the groups. The present study showed that previous strength training facilitates retraining-induced muscle hy-pertrophy following long-term cessation of exercise.

목차

Abstract
 INTRODUCTION
 MATERIALS AND METHODS
  Animals and treatments
  Muscle training protocol
  Detraining and retraining
  Determination of in situ contractile properties
  Determination of cross sectional area
  Data analysis
 RESULTS
  Muscle weight change
  CSA change
  Contractile properties change
 DISCUSSION
 CONFLICT OF INTEREST
 ACKNOWLEDGMENTS
 REFERENCES

키워드

저자

• Sukho Lee [ Department of Counseling, Health, and Kinesiology, College of Education and Human Development, Texas A&M University-San Antonio, San Antonio, TX, USA ]
• Kwang-Seok Hong [ Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, USA ]
• Kijeong Kim [ School of Exercise & Sport Science, College of Natural Sciences, University of Ulsan, Ulsan, Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  JER [Journal of Exercise Rehabilitation]

• 간기

  격월간

• pISSN

  2288-176X

• eISSN

  2288-1778

• 수록기간

  2013~2026

• 등재여부

  SCOPUS,KCI 등재

• 십진분류

  KDC 517 DDC 613