Prediction of Maximal Heart Rate in Children and Adolescents

Miri Gelbart, Tomer Ziv-Baran, Craig A. Williams, Yoni Yarom, Gal Dubnov-Raz
2017 Clinical Journal of Sports Medicine  
1 Objective: To identify a method to predict the maximal heart rate (MHR) in children 2 and adolescents, as available prediction equations developed for adults have a low 3 accuracy in children. We hypothesized that MHR may be influenced by resting heart 4 rate, anthropometric factors or fitness level. 5 6 Design: Cross-sectional study 7 8 Setting: Sports medicine center in primary care 9 10 Participants: Data from 627 treadmill maximal exercise tests performed by 433 11 pediatric athletes (age
more » ... atric athletes (age 13.7±2.1 years, 70% males) were analyzed. 12 13 Independent variables: Age, sex, sport type, stature, body mass, BMI, body fat, 14 fitness level, resting and MHR were recorded. 15 16 Main outcome measures: To develop a prediction equation for MHR in youth, using 17 stepwise multivariate linear regression and linear mixed model. To determine 18 correlations between existing prediction equations and pediatric MHR. 19 20 Results: Observed MHR was 197±8.6 b•min -1 . Regression analysis revealed that 21 resting heart rate, fitness, body mass and fat percent were predictors of MHR 22 (R 2 =0.25,p<0.001), while age was not. Resting heart rate explained 15.6% of MHR 23 variance, body mass added 5.7%, fat percent added 2.4% and fitness added 1.2%. 24 3 Existing adult equations had low correlations with observed MHR in children and 25 adolescents (r=-0.03-0.34). 26 27 Conclusions: A new equation to predict MHR in children and adolescents was 28 developed, but was found to have low predictive ability, a finding similar to adult 29 equations applied to children. 30 31 Clinical relevance: Considering the narrow range of MHR in youth, we propose using 32 197 b•min -1 as the mean MHR in children and adolescents, with 180 b•min -1 the 33 minimal threshold value (-2 standard deviations). 34 35
doi:10.1097/jsm.0000000000000315 pmid:27177205 fatcat:mxsbqh5rmrfqnewfmojgmrsxqq