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Original Article

Effects of linear versus nonperiodized resistance training on isometric force and skeletal muscle mass adaptations in sarcopenic older adults

초록

영어

The aim of this study was to compare the effects of linear periodization (LP) versus nonperiodized (NP) resistance training on upper-body isometric force and skeletal muscle mass (SMM) in sarcopenic older adults. Twenty sarcopenic older adults were randomly assigned into the LP and NP groups and performed 16 weeks of resistance training. The SMM was measured by octopolar bioelectrical impedance. The isometric force for handgrip and trunk were assessed by dynamometer. Evaluations were performed at baseline, after 4, 8, 12, and 16 weeks of resistance training. For total weight lifted, there was a main effect for time (F= 126.986, P< 0.001), statistically significant difference between condition (F=13.867, P=0.001) and interaction (F=8.778, P<0.001), whereby total weight lifted was greater for NP after 4 months of training. Isometric force for handgrip and trunk increased across time (P< 0.001) but no significant differences between groups or interaction were observed (P> 0.05). The SMM increased across time (P< 0.05), however no significant difference between groups or interaction were observed (P> 0.05). There were strong and significant correlations between handgrip maximum force and SMM (LP: rho= 0.79, P= 0.004 vs. NP: rho =-0.43, P=0.244) and handgrip mean force and SMM (LP: rho= 0.68, P= 0.021 vs. NP: rho= -0.37, P= 0.332) only for the LP group. In conclusion, LP and NP resistance training induced similar benefits on upper-body isometric force and SMM in sarcopenic older adults. However, LP presented lower total weight lifted, suggesting that it is possible to obtain similar gains in isometric force and SMM with less total work.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
Experimental design
Subjects
Procedures
Statistical analysis
RESULTS
DISCUSSION
CONFLICT OF INTEREST
REFERENCES

저자정보

  • Marcelo Conrado de Freitas Skeletal Muscle Assessment Laboratory (LABSIM), Department of Physical Education, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil, Post Graduation Program in Movement Sciences, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil, Department of Nutrition, University of Western São Paulo (UNOESTE), Presidente Prudente, Brazil
  • Caroline Galan de Souza Pereira Skeletal Muscle Assessment Laboratory (LABSIM), Department of Physical Education, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil, Post Graduation Program in Physical Therapy, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil
  • Vitor Cabrera Batista Skeletal Muscle Assessment Laboratory (LABSIM), Department of Physical Education, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil
  • Fabricio Eduardo Rossi Immunometabolism of Skeletal Muscle and Exercise Research Group, Federal University of Piauí (UFPI), Teresina, Brazil
  • Alex Silva Ribeiro Center for Research in Health Sciences, University of Northern Paraná (UNOPAR), Londrina, Brazil, Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University (UEL), Londrina, Brazil
  • Edilson Serpeloni Cyrino Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University (UEL), Londrina, Brazil
  • Jason M. Cholewa Department of Kinesiology, Coastal Carolina University, Conway, SC, USA
  • Luís Alberto Gobbo Skeletal Muscle Assessment Laboratory (LABSIM), Department of Physical Education, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil, Post Graduation Program in Movement Sciences, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil, Post Graduation Program in Physical Therapy, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil

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