A series of landmark longitudinal studies begun in the 1950s with San Francisco longshoremen by Paffenbarger and associates found which of the following relative to coronary heart disease (CHD) and physical activity (PA) ?

A) Men who began in worse shape had higher CHD death rates despite PA.
B) Men who began in better shape had lower CHD death rates despite PA.
C) Men who had less PA over time had significantly greater CHD deaths.
D) Men who had more PA over time had significantly higher CHD deaths.

Question

​A series of landmark longitudinal studies begun in the 1950s with San Francisco longshoremen by Paffenbarger and associates found which of the following relative to coronary heart disease (CHD)  and physical activity (PA) ?A)  ​Men who began in worse shape had higher CHD death rates despite PA.B)  ​Men who began in better shape had lower CHD death rates despite PA.C)  ​Men who had less PA over time had significantly greater CHD deaths.D)  ​Men who had more PA over time had significantly higher CHD deaths.

Lauren Brown · Accepted Answer

Final Answer : C, Explanation :  The landmark longitudinal studies conducted by Paffenbarger and associates found that men who had less physical activity over time had significantly greater CHD deaths, indicating a strong association between physical activity and CHD risk. The other options are incorrect as they imply that physical activity has either no effect or a negative effect on CHD risk, which is not supported by the findings of the study.

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