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The Journal of Sports Medicine and Physical Fitness 2020 Jun 29

DOI: 10.23736/S0022-4707.20.10675-3


language: English

Cardiorespiratory fitness is associated with body composition and insulin resistance and in European adolescents; HELENA study

Katerina KONDAKIS 1 , Marios KONDAKIS 2, Odysseas ANDROUTSOS 7, Stefaan DE HENAUW 1, Marcela GONZÁLEZ-GROSS 3, Luis A. MORENO 4, Anthony KAFATOS 5, Yannis MANIOS 6

1 Department of Public Health, Ghent University, Ghent, Belgium; 2 Department of Statistics, Athens University of Economics and Business, Athens, Greece; 3 Department of Health and Human Performance, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Madrid, Spain; 4 Escuela Universitaria de Ciencias de la Salud, Universidad de Zaragoza, Zaragoza, Spain; 5 Preventive Medicine & Nutrition Unit, University of Crete School of Medicine, Heraklion, Crete, Greece; 6 Department of Nutrition & Dietetics, Harokopio University, Athens, Greece


BACKGROUND: The present study aims to examine the independent association between cardiorespiratory fitness, sedentary time and insulin resistance in European adolescents.
METHODS: A subset (n=1.097) of a large multicentre European study (HELENA-CSS study) was used in the present study. Serum concentrations of glucose (GF) and insulin (IF) were measured after overnight fast and Homeostasis model assessment ( HOMA-IR) was calculated. Sedentary time and time spent on moderate-to-vigorous physical activity (MVPA) was objectively measured by accelerometers. Moreover, sedentary activities were self-reported via questionnaires.
RESULTS: Multilevel linear regression analysis revealed that adolescents watching TV≥2 h/day had higher HOMA-IR (p=0.007). Further adjustment for MVPA, showed that watching TV≥2 h/day remained significantly associated with IR (p=0.002). In this model, MVPA was inversely associated with HOMA-IR (p=0.001). Further controlling for waist circumference showed that adolescents watching TV ≥2 h/day continued to have higher HOMA-IR levels (p=0.002). Stratified analysis by weight status, revealed that watching TV≥2 h/day was independently associated with HOMA-IR only in normal weight adolescents, while MVPA was inversely associated with HOMA-IR in both overweight/obese and normal weight adolescents. Only the volume of maximum oxygen consumption (VO2max) over Body fat mass ratio was inversely associated with HOMA- IR after controlling for several confounders.
CONCLUSIONS: The present study showed that watching TV≥2 h/day and MVPA were associated with HOMA-IR. However, after controlling for several confounders, only VO2max/Body fat mass ratio remained negatively associated with HOMA-IR. Future interventions should aim both to promote physical activity and reduce sedentary time in adolescents to improve their cardiorespiratory fitness and postpone the onset of diabetes in adulthood.

KEY WORDS: HOMA-IR; VO2max/ FFM; HELENA-CSS study; Adolescents; MVPA

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