Comparison of swimming velocity between age-group swimmers through discrete variables and continuous variables by Statistical Parametric Mapping.

IF 2 3区医学 Q3 ENGINEERING, BIOMEDICAL Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2023-08-01 DOI:10.1080/14763141.2023.2241845

Jorge E Morais, Tiago M Barbosa, Tiago Lopes, Shin-Ichiro Moriyama, Daniel A Marinho

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Abstract

The aim of this study was to compare the swimming velocity in front-crawl between age-group swimmers using discrete variables against Statistical Parametric Mapping (SPM). The sample consisted of 30 young male swimmers divided into three groups (each with 10 swimmers) based on their age (group #1: 13.60 ± 0.84 years; group #2: 15.40 ± 0.32 years; group 3: 16.39 ± 0.69 years). Swimmers performed three maximal trials in front-crawl. The best performance was used for analysis. Comparison of swimming velocity between groups was analysed using discrete variables and as a continuous variable (SPM). As a discrete variable, the mean swimming velocity showed a significant difference between groups (p < 0.05). Moreover, when analysed by SPM, swimming velocity showed a significant difference (p = 0.021) between the ~ 44% and ~ 51% of the stroke cycle (transition of the propulsion phases between sides). Post-hoc comparison revealed a significant difference between group #1 and group #3 only in SPM analysis. Researchers, coaches, and practitioners should know that both measurement approaches can be used simultaneously. However, SPM offers more sensitive and accurate results about the swimmers' stroke cycle.

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用统计参数映射的离散变量和连续变量比较不同年龄组游泳者的游泳速度。

本研究的目的是利用离散变量对统计参数映射（SPM）比较不同年龄组游泳运动员的前爬泳速度。样本由30名年轻男性游泳运动员组成，根据年龄分为三组（每组10人）(第一组：13.60±0.84岁；2组：15.40±0.32岁；第三组：16.39±0.69岁)。游泳运动员在前爬泳中进行了三次极限试验。采用最佳性能进行分析。采用离散变量和连续变量（SPM）对各组游泳速度进行比较分析。作为一个离散变量，平均游泳速度在划水周期的~ 44%和~ 51%（两侧之间推进阶段的过渡）之间显示出组间显著差异（p p = 0.021）。事后比较显示，仅在SPM分析中，1组与3组之间存在显著差异。研究人员、教练和实践者应该知道这两种测量方法可以同时使用。然而，SPM提供了更敏感和准确的结果关于游泳者的划水周期。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sports Biomechanics 医学-工程：生物医学

CiteScore

5.70

自引率

9.10%

发文量

135

审稿时长

>12 weeks

期刊介绍： Sports Biomechanics is the Thomson Reuters listed scientific journal of the International Society of Biomechanics in Sports (ISBS). The journal sets out to generate knowledge to improve human performance and reduce the incidence of injury, and to communicate this knowledge to scientists, coaches, clinicians, teachers, and participants. The target performance realms include not only the conventional areas of sports and exercise, but also fundamental motor skills and other highly specialized human movements such as dance (both sport and artistic). Sports Biomechanics is unique in its emphasis on a broad biomechanical spectrum of human performance including, but not limited to, technique, skill acquisition, training, strength and conditioning, exercise, coaching, teaching, equipment, modeling and simulation, measurement, and injury prevention and rehabilitation. As well as maintaining scientific rigour, there is a strong editorial emphasis on ''reader friendliness''. By emphasising the practical implications and applications of research, the journal seeks to benefit practitioners directly. Sports Biomechanics publishes papers in four sections: Original Research, Reviews, Teaching, and Methods and Theoretical Perspectives.