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Short-term Recovery Following Resistance Exercise Leading or not to Failure.

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URI
http://hdl.handle.net/10433/7996
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Authorship
González Badillo, Juan José; Rodríguez Rosell, David; Sánchez Medina, Luis; Ribas Serna, Juan; López López, Covadonga; [et al.]
Palabras clave
athletic performance
heart rate variability
heart rate complexity
hormonal response
neuromuscular fatigue
strength training
CIRFD - Centro de Investigación en Rendimiento Físico y Deportivo
CIRFD - VBT
CIRFD - RFD
Publication date
2015-12-14
Abstract
This study analyzed the time course of recovery following 2 resistance exercise protocols differing in level of effort: maximum (to failure) vs. half-maximum number of repetitions per set. 9 males performed 3 sets of 4 vs. 8 repetitions with their 80% 1RM load, 3×4(8) vs. 3×8(8), in the bench press and squat. Several time-points from 24¿h pre- to 48¿h post-exercise were established to assess the mechanical (countermovement jump height, CMJ; velocity against the 1¿m·s¿1 load, V1-load), biochemical (testosterone, cortisol, GH, prolactin, IGF-1, CK) and heart rate variability (HRV) and complexity (HRC) response to exercise. 3×8(8) resulted in greater neuromuscular fatigue (higher reductions in repetition velocity and velocity against V1-load) than 3×4(8). CMJ remained reduced up to 48¿h post-exercise following 3×8(8), whereas it was recovered after 6¿h for 3×4(8). Significantly greater prolactin and IGF-1 levels were found for 3×8(8) vs. 3×4(8). Significant reductions in HRV and HRC w ...
This study analyzed the time course of recovery following 2 resistance exercise protocols differing in level of effort: maximum (to failure) vs. half-maximum number of repetitions per set. 9 males performed 3 sets of 4 vs. 8 repetitions with their 80% 1RM load, 3×4(8) vs. 3×8(8), in the bench press and squat. Several time-points from 24¿h pre- to 48¿h post-exercise were established to assess the mechanical (countermovement jump height, CMJ; velocity against the 1¿m·s¿1 load, V1-load), biochemical (testosterone, cortisol, GH, prolactin, IGF-1, CK) and heart rate variability (HRV) and complexity (HRC) response to exercise. 3×8(8) resulted in greater neuromuscular fatigue (higher reductions in repetition velocity and velocity against V1-load) than 3×4(8). CMJ remained reduced up to 48¿h post-exercise following 3×8(8), whereas it was recovered after 6¿h for 3×4(8). Significantly greater prolactin and IGF-1 levels were found for 3×8(8) vs. 3×4(8). Significant reductions in HRV and HRC were observed for 3×8(8) vs. 3×4(8) in the immediate recovery. Performing a half-maximum number of repetitions per set resulted in: 1) a stimulus of faster mean repetition velocities; 2) lower impairment of neuromuscular performance and faster recovery; 3) reduced hormonal response and muscle damage; and 4) lower reduction in HRV and HRC following exercise.
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