Effects of a portable, cable-based concentric-only resistance machine on muscular strength in untrained young adults

• Trent Yamamoto ^[1] ; Andrew C. Kim ^[1] ; Sarah Mettias ^[1] ; Bilal Pandit ^[1] ; Thalia H. Nguyen ^[1] ; Dominic M. Benna ^[1] ; Trevor L. Nguyen ^[1] ; August E. Blatney ^[1] ; Ross J. Lechner ^[1] ; Mitchell S. Mologne ^[2] ; Eric V. Neufeld ^[3] ; Brett A. Dolezal ^[1]
  1. [1] University of California Los Angeles
  2. [2] Washington University School of Medicine
  3. [3] Hofstra University

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• Localización: Scientific Journal of Sport and Performance, ISSN-e 2794-0586, Vol. 3, Nº. 2, 2024, págs. 170-179
• Idioma: inglés
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  • The purpose of this study was to investigate the effects of concentric-only resistance training in comparison to traditional concentric-eccentric resistance training on upper and lower body strength using a portable cable-based concentric-only resistance machine. Thirty-two participants (10 females, 22 males; mean age of 23.4 ± 2.0) with minimal resistance training experience exercised thrice weekly to complete a 12-week training program. Participants were blinded and randomly allocated 1:1 to an intervention group (n = 16, wherein the resistance training used the concentric-only machine (CRT)) or a control group (n = 16, wherein the resistance training was completed using traditional concentric-eccentric with a conventional cable-based machine (CON)). While both groups improved in 1-RM chest press and squat press performance, there was no significant difference between groups. These findings suggest that the use of a portable CRT machine may confer similar strength benefits in comparison to traditional concentric-eccentric training. It is possible that the lack of the eccentric component with the CRT machine enables for a higher training volume to be completed, which consequently results in strength benefits.