| http://www.w3.org/ns/prov#value | - However, there were no changes in BMI.The eighteenth intervention was a long-term longitudinal study initiated in the 1970s with primary school students in Canada called the Trois-Rivieres Growth and Development Study which followed up 12-year-old primary school children who had completed 6 years of physical education in school to the age of 34 years (66???70).
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