Influence of vitamin D supplementation on muscle strength and exercise capacity in Mongolian schoolchildren: secondary outcomes from a randomised controlled trial

Autor: David A Jolliffe, Adrian R Martineau, Khulan Dorjnamjil, Davaasambuu Ganmaa, Stephanie Hemmings, Uyanga Buyanjargal, Gantsetseg Garmaa, Unaganshagai Adiya, Tumenulzii Tumurbaatar, Enkhtsetseg Tserenkhuu, Sumiya Erdenenbaatar, Enkhjargal Tsendjav, Nomin Enkhamgalan, Chuluun-Erdene Achtai, Yagaantsetseg Talhaasuren, Tuya Byambasuren, Erdenetuya Ganbaatar, Erkhembulgan Purevdorj
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: BMJ Open Sport & Exercise Medicine, Vol 10, Iss 3 (2024)
Druh dokumentu: article
ISSN: 2055-7647
DOI: 10.1136/bmjsem-2024-002018
Popis: Objective To determine whether weekly oral vitamin D supplementation influences grip strength, explosive leg power, cardiorespiratory fitness or spirometric lung volumes in Mongolian schoolchildren.Methods Multicentre, randomised, placebo-controlled clinical trial conducted in children aged 6–13 years at baseline attending 18 schools in Ulaanbaatar. The intervention was weekly oral doses of 14 000 IU vitamin D3 (n=4418) or placebo (n=4433) for 3 years. Outcome measures were grip strength, standing long jump distance and serum 25-hydroxyvitamin D (25(OH)D) concentrations (determined in all participants), peak oxygen uptake (VO2peak, determined in a subset of 632 participants using 20 m multistage shuttle run tests) and spirometric outcomes (determined in a subset of 1343 participants).Results 99.8% of participants had serum 25(OH)D concentrations
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