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Acute Metabolic Response, Neuromuscular Activity, and Mechanical Performance to Different Set
José Antonio Páez-Maldonado1,2, PedroJesús Cornejo-Daza2,3, Juan Sánchez-Valdepeñas2,3
1University of Osuna (Centre attached to the University of Seville), Osuna, Spain.
International Journal of Sports Medicine
|July 29, 2024
Summary
Shorter, more frequent rest periods during resistance exercise, like the cluster-2 (CS2) protocol, enhance mechanical performance and reduce fatigue compared to traditional sets (TS). This approach improves strength training outcomes by maintaining power output and neuromuscular activity.
Area of Science:
- Exercise Physiology
- Sports Science
- Biomechanics
Background:
- Understanding resistance training set configurations is crucial for optimizing performance and managing fatigue.
- Traditional set (TS) structures may lead to significant neuromuscular and metabolic fatigue.
- Cluster set (CS) strategies, involving intraset rest, are proposed to mitigate fatigue and enhance training outcomes.
Purpose of the Study:
- To investigate the acute effects of different bench-press (BP) set configurations on metabolic response, neuromuscular activity, and mechanical performance.
- To compare the traditional set (TS) with two cluster set protocols: cluster-6 (CS6) and cluster-2 (CS2).
- To determine which set configuration best maintains performance and minimizes fatigue during resistance exercise.
Main Methods:
- Twenty-two resistance-trained men completed three BP protocols (TS, CS6, CS2) at 60% 1RM.
- Intraset rest intervals varied: no rest for TS, 30s after rep 6 for CS6, and 30s every 2 reps for CS2.
- Measurements included mean propulsive force (MPF), velocity (MPV), power (MPP), electromyography (EMG), blood lactate, and maximal voluntary isometric contraction (MVIC).
Main Results:
- The CS2 protocol demonstrated superior mechanical performance (MPF, MPV, MPP) compared to CS6 and TS.
- CS2 also showed lower alterations in EMG parameters (root mean square, median frequency) and smaller increases in blood lactate.
- No significant differences were found in MVIC variables across protocols over time, suggesting fatigue management benefits.
Conclusions:
- Frequent, short intraset rest periods (CS2) effectively alleviate training-induced fatigue during resistance exercise.
- This strategy leads to better maintenance of mechanical performance and neuromuscular activity.
- Cluster set protocols, particularly CS2, offer an advantageous alternative to traditional set structures for optimizing strength training responses.
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