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Energy expenditure and substrate oxidation.
Time courses (left, mean values plotted at 30-min interval) and accumulated values (right, kcal/24 h) of energy expenditure (a), carbohydrate oxidation (b), and fat oxidation (c) are shown for morning exercise (
, 
), afternoon exercise (
, 
), evening exercise (
, 
), and control trials (—, □). Significantly different mean values are connected by lines (P < 0.01).
