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Thanks for your information anyway, for now I have seen the author's presentation on the sample, and it's seems to me much reasonable, however,I think the processes of data collection should be lack of reliability, since the author himself can't even feel 100% sure about those data and conclusion he drew out, the difficulty lies in it's very hard for them to tell the objectiveness of these survey data !
Besides, it just has challenged some common sense that is widely held true by adolescents or even ourselves, such as the attitudes towards the vegetables and physical sports, what do you think ?
Last, the author has implied in the last paragraph that there's already another article of themselves to account for the contribution of both subjective and objective factors regarding
measures of physical activity, which is part of their "newer" studies, do you have any further information as to this point ? Thanks again !
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