Including the eccentric phase in resistance training to counteract the effects of detraining in women: a randomized-controlled trial

Coratella, Giuseppe, Beato, Marco, Bertinato, Luciano, Milanese, Chiara, Venturelli, Massimo and Schena, Federico (2021) Including the eccentric phase in resistance training to counteract the effects of detraining in women: a randomized-controlled trial. Journal of Strength and Conditioning Research. ISSN 1064-8011 (In Press)

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Abstract

The current study compared the effects of concentric-based (CONC), eccentric-based (ECC) and traditional concentric-eccentric (TRAD) resistance training on muscle strength, mass and architecture and the post-detraining retention of the training-induced effects in women. Sixty women were randomly assigned to unilateral volume-equated CONC, ECC or TRAD knee-extension training or control (N=15 per group). Before, after an 8-week intervention and 8-week detraining period, isokinetic concentric, eccentric and isometric torque were measured. Additionally, thigh lean mass was assessed by dual X-ray absorptiometry and vastus lateralis thickness, pennation angle and fascicle length by ultrasound. After training, concentric and isometric torque increased (p<0.05) similarly in all groups, while eccentric torque increased more in ECC than CONC [+13.1%, effect size (ES): 0.71(0.04/1.38)] and TRAD [+12.6%, ES: 0.60(0.12/1.08)]. Thigh lean mass increased in ECC [+6.1%, ES: 0.47(0.27/0.67)] and TRAD [+3.1%, ES: 0.33(0.01/0.65)]. Vastus lateralis thickness and pennation angle increased (p<0.05) similarly in all groups, while fascicle elongation was visible in ECC [+9.7%, ES: 0.92(0.14/1.65)] and TRAD [+7.1%, ES: 0.64(0.03/1.25)]. After detraining, all groups retained (p<0.05) similarly concentric torque. ECC and TRAD preserved eccentric torque (p<0.05), but ECC more than TRAD [+17.9%, ES: 0.61(0.21/1.21)]. All groups preserved isometric torque (p<0.05), but ECC more than CONC [+14.2%, ES: 0.71(0.04/1.38)] and TRAD [+13.8%, ES: 0.65(0.10/1.20)]. Thigh lean mass and vastus lateralis fascicle length were retained only in ECC (p<0.05), pennation angle was preserved in all groups (p<0.05) and thickness was retained in CONC and ECC (p<0.05). Including the eccentric phase in resistance training is essential to preserve adaptations after detraining.

Item Type: Article
Uncontrolled Keywords: isokinetic, quadriceps, strength, hypertrophy, muscle architecture, vastus lateralis, fascicle length, DXA
Subjects: Q Science > QP Physiology
Divisions: Faculty of Health & Science > Department of Science & Technology
Depositing User: Marco Beato
Date Deposited: 23 Feb 2021 09:05
Last Modified: 23 Feb 2021 09:05
URI: http://oars.uos.ac.uk/id/eprint/1623

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