Resumen de Effects of a portable, cable-based concentric-only resistance machine on muscular strength in untrained young adults
Trent Yamamoto, Andrew Kim
, Sarah Mettias, Bilal Pandit, Thalia H. Nguyen, Dominic M. Benna, Trevor L. Nguyen, August E. Blatney, Ross J. Lechner, Mitchell S. Mologne, Eric V. Neufeld, Brett A. Dolezal
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.
