Journal
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
Volume 29, Issue 1, Pages 16-24Publisher
WILEY
DOI: 10.1111/sms.13307
Keywords
adiposity; aerobic fitness; allometric scaling; children; maximal exercise; metabolic health
Categories
Funding
- Ministry of Education and Culture of Finland
- Ministry of Social Affairs and Health of Finland
- Research Committee of the Kuopio University Hospital Catchment Area
- Finnish Innovation Fund Sitra
- Social Insurance Institution of Finland
- Finnish Cultural Foundation
- Foundation for Paediatric Research
- Diabetes Research Foundation in Finland
- Finnish Foundation for Cardiovascular Research
- Juho Vainio Foundation
- Paavo Nurmi Foundation
- Yrjo Jahnsson Foundation
- Olvi Foundation
- Urho Kankanen Foundation
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We aimed to develop cut-points for directly measured peak oxygen uptake (VO2peak) to identify boys and girls at increased cardiometabolic risk using different scaling methods to control for body size and composition. Altogether 352 children (186 boys, 166 girls) aged 9-11 years were included in the analyses. We measured V ? O-2peak directly during a maximal cycle ergometer exercise test and lean body mass (LM) by bioelectrical impedance. We computed a sex- and age-specific cardiometabolic risk score (CRS) by summing important cardiometabolic risk factors and defined increased cardiometabolic risk as >1 standard deviation above the mean of CRS. Receiver operating characteristics curves were used to detect V ? O-2peak cut-points for increased cardiometabolic risk. Boys with V ? O-2peak <45.8 mL kg body mass (BM)(-1) min(-1) (95% confidence interval [CI] = 45.1 to 54.6, area under the curve [AUC] = 0.86, P < 0.001) and <63.2 mL kg LM-1 min(-1) (95% CI =52.4 to 67.5, AUC = 0.65, P = 0.006) had an increased CRS. Girls with V ? O-2peak <44.1 mL kg BM-1 min(-1) (95% CI = 44.0 to 58.6, AUC = 0.67, P = 0.013) had an increased CRS. V ? O-2peak scaled by BM-0.49 and LM-0.77 derived from log-linear allometric modeling poorly predicted increased cardiometabolic risk in boys and girls. In conclusion, directly measured VO2peak <45.8 mL kg BM-1 min(-1) among boys and <44.1 mL kg BM-1 min(-1) among girls were cut-points to identify those at increased cardiometabolic risk. Appropriately controlling for body size and composition reduced the ability of cardiorespiratory fitness to identify children at increased cardiometabolic risk.
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