Effect of increased exercise in school children on physical fitness and endothelial progenitor cells: a prospective randomized trial. Walther, C., Gaede, L., Adams, V., Gelbrich, G., Leichtle, A., Erbs, S., Sonnabend, M., Fikenzer, K., Körner, A., Kiess, W., Bruegel, M., Thiery, J., & Schuler, G. Circulation, 120(22):2251–2259, December, 2009.
doi  abstract   bibtex   
BACKGROUND: The aim of this prospective, randomized study was to examine whether additional school exercise lessons would result in improved peak oxygen uptake (primary end point) and body mass index-standard deviation score, motor and coordinative abilities, circulating progenitor cells, and high-density lipoprotein cholesterol (major secondary end points). METHODS AND RESULTS: Seven sixth-grade classes (182 children, aged 11.1+/-0.7 years) were randomized to an intervention group (4 classes with 109 students) with daily school exercise lessons for 1 year and a control group (3 classes with 73 students) with regular school sports twice weekly. The significant effects of intervention estimated from ANCOVA adjusted for intraclass correlation were the following: increase of peak o(2) (3.7 mL/kg per minute; 95% confidence interval, 0.3 to 7.2) and increase of circulating progenitor cells evaluated by flow cytometry (97 cells per 1 x 10(6) leukocytes; 95% confidence interval, 13 to 181). No significant difference was seen for body mass index-standard deviation score (-0.08; 95% confidence interval, -0.28 to 0.13); however, there was a trend to reduction of the prevalence of overweight and obese children in the intervention group (from 12.8% to 7.3%). No treatment effect was seen for motor and coordinative abilities (4; 95% confidence interval, -1 to 8) and high-density lipoprotein cholesterol (0.03 mmol/L; 95% confidence interval, -0.08 to 0.14). CONCLUSIONS: Regular physical activity by means of daily school exercise lessons has a significant positive effect on physical fitness (o(2)max). Furthermore, the number of circulating progenitor cells can be increased, and there is a positive trend in body mass index-standard deviation score reduction and motor ability improvement. Therefore, we conclude that primary prevention by means of increasing physical activity should start in childhood. CLINICAL TRIAL REGISTRATION: URL: http://www.clinicaltrials.gov. Identifier: NCT00176371.
@article{walther_effect_2009,
	title = {Effect of increased exercise in school children on physical fitness and endothelial progenitor cells: a prospective randomized trial},
	volume = {120},
	issn = {1524-4539},
	shorttitle = {Effect of increased exercise in school children on physical fitness and endothelial progenitor cells},
	doi = {10.1161/CIRCULATIONAHA.109.865808},
	abstract = {BACKGROUND: The aim of this prospective, randomized study was to examine whether additional school exercise lessons would result in improved peak oxygen uptake (primary end point) and body mass index-standard deviation score, motor and coordinative abilities, circulating progenitor cells, and high-density lipoprotein cholesterol (major secondary end points).
METHODS AND RESULTS: Seven sixth-grade classes (182 children, aged 11.1+/-0.7 years) were randomized to an intervention group (4 classes with 109 students) with daily school exercise lessons for 1 year and a control group (3 classes with 73 students) with regular school sports twice weekly. The significant effects of intervention estimated from ANCOVA adjusted for intraclass correlation were the following: increase of peak o(2) (3.7 mL/kg per minute; 95\% confidence interval, 0.3 to 7.2) and increase of circulating progenitor cells evaluated by flow cytometry (97 cells per 1 x 10(6) leukocytes; 95\% confidence interval, 13 to 181). No significant difference was seen for body mass index-standard deviation score (-0.08; 95\% confidence interval, -0.28 to 0.13); however, there was a trend to reduction of the prevalence of overweight and obese children in the intervention group (from 12.8\% to 7.3\%). No treatment effect was seen for motor and coordinative abilities (4; 95\% confidence interval, -1 to 8) and high-density lipoprotein cholesterol (0.03 mmol/L; 95\% confidence interval, -0.08 to 0.14).
CONCLUSIONS: Regular physical activity by means of daily school exercise lessons has a significant positive effect on physical fitness (o(2)max). Furthermore, the number of circulating progenitor cells can be increased, and there is a positive trend in body mass index-standard deviation score reduction and motor ability improvement. Therefore, we conclude that primary prevention by means of increasing physical activity should start in childhood.
CLINICAL TRIAL REGISTRATION: URL: http://www.clinicaltrials.gov. Identifier: NCT00176371.},
	language = {eng},
	number = {22},
	journal = {Circulation},
	author = {Walther, Claudia and Gaede, Luise and Adams, Volker and Gelbrich, Götz and Leichtle, Alexander and Erbs, Sandra and Sonnabend, Melanie and Fikenzer, Kati and Körner, Antje and Kiess, Wieland and Bruegel, Mathias and Thiery, Joachim and Schuler, Gerhard},
	month = dec,
	year = {2009},
	pmid = {19920000},
	keywords = {Body Mass Index, Cardiovascular Diseases, Child, Endothelial Cells, Exercise, Female, Flow Cytometry, Hematopoietic Stem Cells, Humans, Lipids, Male, Motor Activity, Obesity, Oxygen Consumption, Physical Education and Training, Physical Fitness, Prospective Studies, Sports},
	pages = {2251--2259},
}
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