Survey Text

1990
1985
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1990
Survey form view entire document:  text  image
b. For how many minutes do you think a person should exercise on each occasion so that the heart and lungs are strengthened?

Minutes ____
999[] DK

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1985
Survey form view entire document:  text  image
b. For how many minutes do you think a person should exercise on EACH occasion so that the heart and lungs are strengthened?

Minutes ____
999 [] DK