​A Series of Landmark Longitudinal Studies Begun in the 1950s

Multiple Choice

​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.