Effect of different inter-repetition rest intervals across four load intensities on velocity loss and blood lactate concentration during full squat exercise

This study aimed to analyze the acute effect of inter-repetition rest (IRR) intervals on mechanical and metabolic response during four resistance exercise protocols (REPs). Thirty resistance-trained men were randomly assigned to: continuous repetitions (CR), 10 s (IRR10) or 20 s (IRR20) inter-repeti...

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Bibliographic Details
Published in:Journal of sports sciences 2018-12, Vol.36 (24), p.2856-2864
Main Authors: Mora-Custodio, Ricardo, Rodríguez-Rosell, David, Yáñez-García, Juan Manuel, Sánchez-Moreno, Miguel, Pareja-Blanco, Fernando, González-Badillo, Juan José
Format: Article
Language:English
Subjects:
Blood levels
cluster configurations
Fatigue
Lactic acid
Metabolic response
metabolic stress
Repetition
Resistance training
Strength training
Velocity
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Summary:This study aimed to analyze the acute effect of inter-repetition rest (IRR) intervals on mechanical and metabolic response during four resistance exercise protocols (REPs). Thirty resistance-trained men were randomly assigned to: continuous repetitions (CR), 10 s (IRR10) or 20 s (IRR20) inter-repetition rest. The REPs consisted of 3 sets of 6, 5, 4 and 3 repetitions against 60, 70, 75 and 80% 1RM, respectively, in the full squat exercise. Muscle fatigue was assessed using: percentage of velocity loss over three sets, percentage of velocity loss against the ~1 m·s −1 load (V1 m·s −1 ), and loss of countermovement jump (CMJ) height pre-post exercise. Blood lactate was measured before and after exercise. The percentage of velocity loss over three sets and lactate concentration were significantly lower (P 
ISSN:0264-0414
1466-447X
DOI:10.1080/02640414.2018.1480052