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The Effects of Active Versus Passive Interset Rest Intervals in the Bench-Press Exercise in Resistance-Trained Men: A
Luis A Berlanga1,2, José López-Chicharro3, Ismael Martínez-Guardado4
1Department of Physical Activity and Sport, Centro de Estudios Universitarios Cardenal Spínola CEU, Seville, Spain.
Active rest intervals during resistance training may improve performance by reducing velocity loss and lactate buildup. This active approach during rest periods may offer a metabolic advantage for subsequent sets.
Area of Science:
- Exercise Physiology
- Sports Science
- Biomechanical Analysis
Background:
- Interset rest (ISR) in resistance training (RT) is under-researched, with focus on duration rather than stimulus.
- Understanding the impact of different ISR stimuli is crucial for optimizing RT protocols.
Purpose of the Study:
- To compare the effects of 2-minute passive (PAS) versus active (ACT) ISR on intraset velocity loss, blood lactate, and perceived exertion.
- To investigate the influence of active rest on performance during bench press in trained men.
Main Methods:
- Fourteen resistance-trained men performed 5x8 repetitions at maximal velocity using individualized loads for maximal power output.
- Two RT sessions were conducted with either 2-minute PAS or ACT ISR, including vertical chest press during ACT.
- Intraset velocity loss, blood lactate concentrations, and rating of perceived exertion were measured.
Main Results:
- Intraset velocity loss was not significantly different between ACT and PAS ISR protocols (P = .571).
- Blood lactate concentrations increased similarly in both protocols, with a trend towards a diminished increase in ACT (P > .05).
Conclusions:
- Active ISR was well-tolerated and may mitigate performance decline from accumulated workload.
- ACT ISR might provide a metabolic advantage for exercise performance in consecutive sets during resistance training bouts.
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