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Extramural sports:
Organized and supervised sports programs sanc-
tioned by the school system that provide opportunities for competi-
tion outside the bounds of a particular school.
Intramural sports:
Organized and supervised sports programs involv-
ing within-school teams and clubs that provide opportunities for all 
students to participate.
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Educating the Student Body: Taking Physical Activity and Physical Education to School
18
 
Educating the Student Body
Moderate-intensity physical activity:
Physical exertion that is 
equivalent to brisk walking. Such activities are usually performed at 
between 3.5 and 6.0 times resting metabolic rate.
Physical activity:
Bodily movement that increases energy expenditure.