Acute Effects of Intracontrast Rest After Back Squats on Vertical Jump Performance During Complex Training.
J Strength Cond Res
; 38(11): e645-e655, 2024 Nov 01.
Article
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| MEDLINE
| ID: mdl-39016263
ABSTRACT
ABSTRACT Houlton, LJ, Moody, JA, Bampouras, TM, and Esformes, JI. Acute effects of intracomplex rest after back squats on vertical jump performance during complex training. J Strength Cond Res 38(11) e645-e655, 2024-Postactivation performance enhancement and complex-contrast sets are prevalent in sports science research. Typical complex-contrast sets consist of heavy back squats, an intracontrast rest period (ICRP) and vertical jumps (countermovement jumps [CMJs], or squat jumps [SJs]). Propulsive impulse (J prop ) is considered the leading indicator of jump performance. However, studies evaluating jump performance during complex-contrast sets use jump height as the primary performance measure, limiting insight into ICRP's effect on jump performance. We assessed the effect of a 3 repetition maximum (3RM) back squat and 6 ICRPs on vertical jump J prop and associated force-time components. Fourteen subjects completed 12 experimental conditions, assigned equally to 4 testing sessions. Independent variables, in a 6 × 2 randomized, counterbalanced design, were ICRP (0, 60, 120, 180, 240, 300 seconds; ICRP0, ICRP60, ICRP120, ICRP180, ICRP240, ICRP300, respectively) and vertical jump (CMJ and SJ). Conditions consisted of baseline vertical jumps, followed by 3 back squat repetitions at 100% 3RM, an ICRP and experimental jumps. Symmetrized percentage changes between experimental and baseline jumps were assessed using repeated measures analysis of variance (ANOVA) and pairwise effect sizes. Results showed significant effects ( p ≤ 0.05) on CMJ average rate of force development (RFD) between ICRP0 and ICRP120 and ICRP0 and ICRP300. Pairwise comparisons showed medium and large effect sizes for and increases in CMJ RFD ( g = 0.83-2.69) whereas SJ RFD decreased ( g = 0.81-2.57). Small effect sizes were found for J prop , peak force, and mean force. Results suggest limited change in J prop ( g = 0.01-0.58), but back squats may potentiate RFD via the stretch-shortening cycle.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Descanso
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Rendimiento Atlético
Límite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
J Strength Cond Res
Asunto de la revista:
FISIOLOGIA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Reino Unido
Pais de publicación:
Estados Unidos