The Relationship Between Training Volume and BMI in the Expression of Running Performance in Runners: A Mediation Model  

作　　者：Mabliny Thuany Lee Hill JoséRamón Alvero‑Cruz Beat Knechtle Thayse Natacha Gomes 

机构地区：[1]CIFI²D,Faculty of Sport,University of Porto,Porto,Portugal [2]Division of Gastroenterology and Nutrition,Department of Pediatrics,McMaster University,Hamilton,ON L8N 3Z5,Canada [3]Dpto de Fisiología Humana,Histología,Anatomia Patológica y Educación Física y Deportiva,Universidad de Málaga,Málaga,Spain [4]Medbase St.Gallen Am Vadianplatz,Vadianstrasse 26,9001 St.Gallen,Switzerland [5]Department of Physical Education,Federal University of Sergipe,São Cristóvão,SE,Brazil

出　　处：《Journal of Science in Sport and Exercise》2023年第2期142-148,共7页体育运动科学（英文）

摘　　要：Purpose The relationships between anthropometric and training variables with running performance were previously investi-gated.However,it is possible that through the moderating role of anthropometric variables,the magnitude of the relationship between training and performance may be changed.The purpose of this study was to estimate the mediation role of body mass index(BMI)in the relationship between training volume and running performance among non-professional runners,taking into account sex and age category.Methods The sample comprised 1151 non-professional road runners(61.8%male),aged 18–72 years.Information about sex,age,body mass(kg),body height(cm),running pace,motivation for running,training volume and frequency were obtained through an online questionnaire.Taking into account athletes’age,they were split into two age categories:“until 34 years”(adult runners)and“≥35 years”(master athletes).A mediation analysis was computed in Macro Process(SPSS 26),considering sex and age category.BMI was the mediating variable,while training volume/week was used as independ-ent variable,and running pace was considered as dependent variable.Results For both sexes and age categories,a significant association between training volume on running pace was observed[male adult:β=-0.67;95%CI(-1.04 to-0.53);male master:β=-0.241;95%CI(-0.44 to-0.26);female adult:-0.83;95%CI(-1.25 to-0.41);female master:-0.76;95%CI(-1.09 to-0.44)],as well the association between training volume and BMI;and running BMI and running pace.Except for female adult runners,a mediation effect of BMI was observed.Conclusion The present study showed that BMI mediated the association between training volume and running pace in non-professional runners of different sexes and age categories.On the other hand,a small influence of training volume on the expression of BMI was found.

关 键 词：Body mass index Running Mediation model 

分 类 号：G80[文化科学—运动人体科学]