Correlations between one-repetition maximum weights of different back squat depths

IF 0.6 4区医学 Q4 ENGINEERING, BIOMEDICAL

Isokinetics and Exercise Science Pub Date : 2022-12-29 DOI:10.3233/ies-220106

Shota Enoki, Junpei Shiba, Taisei Hakozaki, Yuki Suzuki, K. Kuzuhara

{"title":"Correlations between one-repetition maximum weights of different back squat depths","authors":"Shota Enoki, Junpei Shiba, Taisei Hakozaki, Yuki Suzuki, K. Kuzuhara","doi":"10.3233/ies-220106","DOIUrl":null,"url":null,"abstract":"BACKGROUND: Although squat depth determines the weight that can be lifted while squatting, it is unclear whether the One-repetition maximum (1RM) at one squat depth can be used to estimate the 1RM at another squat depth. OBJECTIVE: To determine the correlations between 1RM weights at different back squat depths (BSQs) in frequently trained male collegiate athletes. METHODS: This cross-sectional study included 26 male collegiate athletes. Body composition, lower extremity length, and 1RM of BSQ were measured. 1RM of BSQ was measured at three positions (quarter, half and parallel positions), defined as 45 degrees of knee flexion (quarter, Q-SQ), 90 degrees of knee flexion (half, H-SQ), and femur parallel to the ground (parallel, P-SQ), respectively. All testing was conducted by a certified strength and conditioning specialist. Pearson’s correlation analysis and Spearman’s rank correlation were used to examine the correlation between 1RM at each squat depth. RESULTS: There was a significant correlation between 1RM in the H-SQ and P-SQ positions (p< 0.001, r= 0.725, R2= 0.526, y= 1.0728x+ 24.641), but no significant correlation between 1RM of Q-SQ and P-SQ, and 1RM of Q-SQ and H-SQ. There were significant correlations between the 1RM of Q-SQ and height (p= 0.001, r= 0.594), and with the length of the lower extremities (p= 0.002, r= 0.586). CONCLUSIONS: Mutual estimation of the 1RM of H-SQ or P-SQ from the 1RM of the other squat position is possible. Estimation of the 1RM of Q-SQ from the 1RM of H-SQ or P-SQ is, however, difficult, and must be measured separately. Future studies should be conducted with larger sample sizes, in athletes of various sports, and in females.","PeriodicalId":54915,"journal":{"name":"Isokinetics and Exercise Science","volume":" ","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Isokinetics and Exercise Science","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.3233/ies-220106","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, BIOMEDICAL","Score":null,"Total":0}

引用次数: 0

Abstract

BACKGROUND: Although squat depth determines the weight that can be lifted while squatting, it is unclear whether the One-repetition maximum (1RM) at one squat depth can be used to estimate the 1RM at another squat depth. OBJECTIVE: To determine the correlations between 1RM weights at different back squat depths (BSQs) in frequently trained male collegiate athletes. METHODS: This cross-sectional study included 26 male collegiate athletes. Body composition, lower extremity length, and 1RM of BSQ were measured. 1RM of BSQ was measured at three positions (quarter, half and parallel positions), defined as 45 degrees of knee flexion (quarter, Q-SQ), 90 degrees of knee flexion (half, H-SQ), and femur parallel to the ground (parallel, P-SQ), respectively. All testing was conducted by a certified strength and conditioning specialist. Pearson’s correlation analysis and Spearman’s rank correlation were used to examine the correlation between 1RM at each squat depth. RESULTS: There was a significant correlation between 1RM in the H-SQ and P-SQ positions (p< 0.001, r= 0.725, R2= 0.526, y= 1.0728x+ 24.641), but no significant correlation between 1RM of Q-SQ and P-SQ, and 1RM of Q-SQ and H-SQ. There were significant correlations between the 1RM of Q-SQ and height (p= 0.001, r= 0.594), and with the length of the lower extremities (p= 0.002, r= 0.586). CONCLUSIONS: Mutual estimation of the 1RM of H-SQ or P-SQ from the 1RM of the other squat position is possible. Estimation of the 1RM of Q-SQ from the 1RM of H-SQ or P-SQ is, however, difficult, and must be measured separately. Future studies should be conducted with larger sample sizes, in athletes of various sports, and in females.

查看原文本刊更多论文

不同后蹲深度单次重复最大重量之间的相关性

背景：虽然深蹲深度决定了深蹲时可以举起的重量，但尚不清楚一个深蹲深度的一次重复最大值（1RM）是否可以用于估计另一个深坐深度的1RM。目的：确定经常训练的男大学生运动员在不同后蹲深度（BSQ）下1RM重量之间的相关性。方法：这项横断面研究包括26名男大学生运动员。测量身体成分、下肢长度和BSQ的1RM。在三个位置（四分之一、一半和平行位置）测量BSQ的1RM，分别定义为45度膝关节屈曲（四分之四，Q-SQ）、90度膝关节弯曲（一半，H-SQ）和股骨平行于地面（平行，P-SQ）。所有测试均由经过认证的强度和调节专家进行。Pearson相关分析和Spearman秩相关用于检验每个深蹲深度1RM之间的相关性。结果：H-SQ和P-SQ位置的1RM之间存在显著相关性（P＜0.001，r＝0.725，R2＝0.526，y＝1.0728x＋24.641），但Q-SQ和P-SQ的1RM以及Q-SQ与H-SQ的IRM之间没有显著相关性。Q-SQ的1RM与身高（p=0.001，r=0.594）和下肢长度（p=0.002，r=0.586）之间存在显著相关性。然而，从H-SQ或P-SQ的1RM估计Q-SQ的IRM是困难的，并且必须单独测量。未来的研究应该在各种运动项目的运动员和女性中使用更大的样本量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Isokinetics and Exercise Science 医学-工程：生物医学

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Isokinetics and Exercise Science (IES) is an international journal devoted to the study of theoretical and applied aspects of human muscle performance. Since isokinetic dynamometry constitutes the major tool in this area, the journal takes a particular interest in exploring the considerable potential of this technology. IES publishes studies associated with the methodology of muscle performance especially with respect to the issues of reproducibility and validity of testing, description of normal and pathological mechanical parameters which are derivable from muscle testing, applications in basic research topics such as motor learning paradigms and electromyography. The journal also publishes studies on applications in clinical settings and technical aspects of the various measurement systems employed in human muscle performance research. The journal welcomes submissions in the form of research papers, reviews, case studies and technical reports from professionals in the fields of sports medicine, orthopaedic and neurological rehabilitation and exercise physiology.