In 1996, the Surgeon General's report recommended 30 minutes of physical activity most, if not
all, days of the week. This recommendation was based on studies that
A) compared target heart rates in individuals with high and low BMIs.
B) assessed the relationship between physical activity and rates of disease and mortality.
C) assessed energy expenditures and BMI.
D) examined the relationship between energy expenditure and healthful body weight.
B
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