Modeling the dose-response rate/associations between VO2max and self-reported Physical Activity Questionnaire in children and adolescents  

作　　者：Alan M.Nevill Michael J.Duncan Gavin Sandercock 

机构地区：[1]Faculty of Education,Health and Wellbeing,University of Wolverhampton,Walsall Campus,Walsall,WS13BD,UK [2]Faculty of Health and Life Sciences,Coventry University,Coventry,CV15FB,UK [3]School of Biological Sciences,University of Essex,Colchester,CO43SQ,UK

出　　处：《Journal of Sport and Health Science》2020年第1期90-95,共6页运动与健康科学（英文）

摘　　要：Background'. This study sought to explore the dose—response rate/association between aerobic fitness (VC)2max) and self-reported physical activity(PA) and to assess whether this association varies by sex, age, and weight status.Methods. VO2max was assessed using the 20・m shuttle・run test. PA was assessed using the Physical Activity Questionnaire (PAQ) for Adolescents(aged > 11 years, PAQ-A) or for Children (aged <11 years, PAQ-C). The associations between V02raax and PAQ were analyzed using analysisof covariance (ANCOVA), adopting PAQ and PAQ2 as covariates but allowing the intercepts and slope parameters of PAQ and PAQ2 tovary with the categorical variables sex, age group, and weight status.Results: ANCOVA identified a curvilinear association between VO2max and PAQ, with positive linear PAQ terms that varied for both sex andweight status but with a negative PAQ2 term of —0.39 (95% confidence interval (CI): —0.57 to —0.21) that was common for all groups in regardto age, sex, and weight status. These curvilinear (inverted U) associations suggest that the benefits of increasing PA (same dose) on VO2max isgreater when children report lower levels of PA compared to children who report higher levels of PA. These dose-response rates were alsosteeper for boys and were steeper for lean children compared to overweight/obese children.Conclusion'. Health practitioners should be aware that encouraging greater PA (same dose) in inactive and underweight children will result ingreater gains in V02max (response) compared with their active and overweight/obese counterparts.Background:This study sought to explore the dose-response rate/association between aerobic fitness(VO2 max) and self-reported physical activity（PA） and to assess whether this association varies by sex,age,and weight status.Methods:VO2 max was assessed using the 20-m shuttle-run test.PA was assessed using the Physical Activity Questionnaire（PAQ） for Adolescents（aged> 11 years,PAQ-A） or for Children（aged <I 1 years,PAQ-C）.The associations between VO2 max and PAQ were analyzed using analysis of covariance（ANCOVA）,adopting PAQ and PAQ2 as covariates but allowing the intercepts and slope parameters of PAQ and PAQ2 to vary with the categorical variables sex,age group,and weight status.Results:ANCOVA identified a curvilinear association between VO2 max and PAQ,with positive linear PAQ terms that varied for both sex and weight status but with a negative PAQ2 term of-0.39（95% confidence interval（CI）:-0.57 to-0.21） that was common for all groups in regard to age,sex,and weight status.These curvilinear（inverted U） associations suggest that the benefits of increasing PA（same dose） on VO2 max is greater when children report lower levels of PA compared to children who report higher levels of PA.These dose-response rates were also steeper for boys and were steeper for lean children compared to overweight/obese children.Conclusion:Health practitioners should be aware that encouraging greater PA（same dose） in inactive and underweight children will result in greater gains in VO2 max（response） compared with their active and overweight/obese counterparts.

关 键 词：Aerobic fitness Curvilinear association SEX Slope parameters Weight status 

分 类 号：G804.2[文化科学—运动人体科学]