The study followed 1104 firefighters from ten Indiana fire departments. These individuals were all male aged 18 or older with the mean age being 39.6 years. None of the subjects had any job restrictions at the beginning of the study which included counting the number of push-ups each subject could perform.
Medical surveillance of these subjects commenced between January 1, 2000 and December 31, 2010 at a local medical clinic under contract with the fire departments.
The statistical results are enlightening. The group of subjects who could perform more than 40 push-ups enjoyed a whopping 96% reduction in CVD events relative to the group which could perform fewer than 10 push-ups.