Antenor Calandrini, Eduardo Macedo Penna, Elren Passos Monteiro, Daniel Boullosa, Victor Silveira Coswig
{"title":"Effects of Eccentric Phase Velocity on Bench Press Concentric Bar Velocity in the Young and Elderly.","authors":"Antenor Calandrini, Eduardo Macedo Penna, Elren Passos Monteiro, Daniel Boullosa, Victor Silveira Coswig","doi":"10.1055/a-2235-1694","DOIUrl":null,"url":null,"abstract":"<p><p>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 (HV<sub>ECC</sub>; maximum velocity) and moderate-velocity eccentric actions (MV<sub>ECC</sub>; 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 <i>d</i> <sub>z</sub>. 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 HV<sub>ECC</sub> at 30% 1RM only. Moreover, young women exhibited superior performance for both 30% and 60% 1RM when using HV<sub>ECC</sub> for all variables analyzed (p<0.05). The HV<sub>ECC</sub> appears to have an impact on the subsequent performance of the concentric phase, particularly when lighter loads (30% 1RM) are utilized, regardless of the age group.</p>","PeriodicalId":14439,"journal":{"name":"International journal of sports medicine","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International journal of sports medicine","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1055/a-2235-1694","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/2/12 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"SPORT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
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 dz. 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, regardless of the age group.
期刊介绍:
The IJSM provides a forum for the publication of papers dealing with both basic and applied information that advance the field of sports medicine and exercise science, and offer a better understanding of biomedicine. The journal publishes original papers, reviews, short communications, and letters to the Editors.