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01.12.2015 | Research article | Ausgabe 1/2016 Open Access

BMC Public Health 1/2016

Physical activity guidelines and cardiovascular risk in children: a cross sectional analysis to determine whether 60 minutes is enough

Zeitschrift:
BMC Public Health > Ausgabe 1/2016
Autoren:
L. M. Füssenich, L. M. Boddy, D. J. Green, L. E. F. Graves, L. Foweather, R. M. Dagger, N. McWhannell, J. Henaghan, N. D. Ridgers, G. Stratton, N. D. Hopkins
Wichtige Hinweise

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

LF – Data analysis and interpretation, significant writer of article, review of final draft. LMB- conception and design, revising manuscript, review of final draft. DJG - conception and design, revising manuscript, review of final draft. LEFG - Data collection and analysis, revising manuscript, review of final draft. LF - Data collection and analysis, revising manuscript, review of final draft. RG - Data collection and analysis, revising manuscript, review of final draft. NM - Data collection and analysis, revising manuscript, review of final draft. JH - Data collection and analysis, revising manuscript, review of final draft. NDR – Data collection and analysis, revising manuscript, review of final draft. GS - conception and design, revising manuscript, review of final draft. NDH - conception and design, significant writer, review of final draft. All authors read and approved the final manuscript.

Abstract

Background

Physical activity reduces cardiovascular mortality and morbidity. The World Health Organisation (WHO) recommends children engage in 60 min daily moderate-to-vigorous physical activity (MVPA). The effect of compliance with this recommendation on childhood cardiovascular risk has not been empirically tested. To evaluate whether achieving recommendations results in reduced composite-cardiovascular risk score (CCVR) in children, and to examine if vigorous PA (VPA) has independent risk-reduction effects.

Methods

PA was measured using accelerometry in 182 children (9–11 years). Subjects were grouped according to achievement of 60 min daily MVPA (active) or not (inactive). CCVR was calculated (sum of z-scores: DXA body fat %, blood pressure, VO2peak, flow mediated dilation, left ventricular diastolic function; CVR score ≥1SD indicated ‘higher risk’). The cohort was further split into quintiles for VPA and odds ratios (OR) calculated for each quintile.

Results

Active children (92 (53 boys)) undertook more MVPA (38 ± 11 min, P < 0.001), had greater VO2peak (4.5 ± 0.8 ml/kg/min P < 0.001), and lower fat % (3.9 ± 1.1 %, P < 0.001) than inactive. No difference were observed between active and inactive for CCVR or OR (P > 0.05). CCVR in the lowest VPA quintile was significantly greater than the highest quintile (3.9 ± 0.6, P < 0.05), and the OR was 4.7 times higher.

Conclusion

Achievement of current guidelines has positive effects on body composition and cardiorespiratory fitness, but not CCVR. Vigorous physical activity appears to have beneficial effects on CVD risk, independent of moderate PA, implying a more prescriptive approach may be needed for future VPA guidelines.
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