Structural and functional cardiac adaptations to a 10-week school-based football intervention for 9-10-year-old children

Scand J Med Sci Sports. 2014 Aug;24 Suppl 1:4-9. doi: 10.1111/sms.12277.

Abstract

The present study investigated the cardiac effects of a 10-week football training intervention for school children aged 9-10 years using comprehensive transthoracic echocardiography as a part of a larger ongoing study. A total of 97 pupils from four school classes were cluster-randomized into a control group that maintained their usual activities (CON; two classes, n = 51, 21 boys and 30 girls) and a football training group that performed an additional 3 × 40 min of small-sided football training per week (FT; two classes, n = 46, 23 boys and 23 girls). No baseline differences were observed in age, body composition, or echocardiographic variables between FT and CON. After the 10-week intervention, left ventricular posterior wall diameter was increased in FT compared with CON [0.4 ± 0.7 vs -0.1 ± 0.6 (± SD) mm; P < 0.01] as was the interventricular septum thickness (0.2 ± 0.7 vs -0.2 ± 0.8 mm; P < 0.001). Global isovolumetric relaxation time increased more in FT than in CON (3.8 ± 10.4 vs -0.9 ± 6.6 ms, P < 0.05) while the change in ventricular systolic ejection fraction tended to be higher (1.4 ± 8.0 vs -1.1 ± 5.5%; P = 0.08). No changes were observed in resting heart rate or blood pressure. In conclusion, a short-term, school-based intervention comprising small-sided football sessions resulted in significant structural and functional cardiac adaptations in pre-adolescent children.

Trial registration: ClinicalTrials.gov NCT01711892.

Keywords: Echocardiography; cardiac dimensions; diastolic function; heart rate; soccer; systolic function.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptation, Physiological*
  • Blood Pressure
  • Child
  • Echocardiography
  • Female
  • Heart Rate
  • Heart Ventricles / anatomy & histology*
  • Heart Ventricles / diagnostic imaging
  • Humans
  • Intention to Treat Analysis
  • Male
  • Soccer / physiology*
  • Stroke Volume / physiology*
  • Ventricular Function / physiology*

Associated data

  • ClinicalTrials.gov/NCT01711892