Effects of Eccentric Phase Velocity on Bench Press Concentric Bar Velocity in the Young and Elderly
This study aimed to investigate the impact of bar velocity during the eccentric
phase on subsequent concentric performance in the young and elderly. Twelve
elderly women (65.2+4.2 years) and 16 young women (23.1+2.1
years) were randomly assigned to four experimental conditions that combined
high-velocity eccentric actions (HVECC; maximum velocity) and
moderate-velocity eccentric actions (MVECC; 2.0 s), using
30% and 60% of their 1-repetition maximum (1RM) on the Smith
machine bench press. Measurements of mean propulsive velocity (MPV), peak
velocity (PV), and mean power (MP) were recorded. Two-way ANOVA with repeated
measures was applied for each variable, when needed, the Bonferroni post hoc was
used. Statistical significance was set at p<0.05, and effect size (ES)
was established by Cohen’s d
z. The results
demonstrated that elderly women showed improved performance in MPV
(+10.0%; ES=− 0.58; p=0.009) and
MP (+11.7%; ES=− 0.14; p=0.045)
when utilizing HVECC at 30% 1RM only. Moreover, young women
exhibited superior performance for both 30% and 60% 1RM when
using HVECC for all variables analyzed (p<0.05). The
HVECC appears to have an impact on the subsequent performance of
the concentric phase, particularly when lighter loads (30% 1RM) are
utilized, re...
Source: International Journal of Sports Medicine - Category: Sports Medicine Authors: Calandrini, Antenor Penna, Eduardo Macedo Monteiro, Elren Passos Boullosa, Daniel Coswig, Victor Silveira Tags: Training & Testing Source Type: research
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