New data is emerging on this subject. Just in the last few months, 2 very interesting studies have been published on the relationship between exercise, physical activity, body mass index, and colorectal cancer. I thought it would be useful to pause and think about this a bit.
The data from the larger of these studies come from Harvard's Nurses' Health Study and the Health Professionals Follow-Up Study. It includes roughly 150,000 people. Every year these participants receive a long survey asking, for example, "How much broccoli do you eat? How much exercise do you get?" In essence, the answers provide a snapshot of participants' nutrition and exercise for the whole year.
Source: Dr. John Marshall, Medscape
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