How much more sleep does a young child need than adolescent?, What's the difference between "larks" and "owls"?, Why is it better not to exercise early in the morning?, When do sportspeople think is a good time to try to break a record?, If you want to lose weight,which is more important:when you eat or how much you eat?, Why is it not a good idea to use gadgets such as tablets and mobiles late at night?

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