The first and most glaring error in logic lies in the fact that the results of only two types of exercising men are reported: those that exercise strenuously outdoors almost every day and those that only had mild exercise once or twice per week. There are no other results mentioned from the survey, such as the results of men who exercise vigorously indoors every day, or those that exercise moderately either indoors or outdoors three or four times per week. Additionally, it is likely that those men that are exercising outdoors vigorously and almost every day are already in better health than those men that only exercise mildly once or twice per week. Unhealthy men, either due to obesity, smoking or other health-related problems, would naturally be expected to exercise less and die sooner than those apparently healthy men who are physically able to exercise strenuously every day.
Furthermore, the writer indicates that the survey looked at men in different parts of the country with a variety of occupations. It would follow that men that can exercise vigorously outdoors almost every day must live in more favorable climates for such exercise. Milder weather that permits outdoor exercise would likely be healthier for any men rather than the harsher climates that may be present in other parts of the country. In addition, some occupations such as a policeman, firefighter or steelworker are naturally more dangerous than others, leading to a possibly reduced life span. The writer fails to take into account any possible disparity in longevity that may be caused by climatic differences where the men lived or due to their occupations, thus weakening the argument and its conclusion.
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