Originally Posted by
ScottCommutes
You are 100% on the right track. Identifying the correlation between bike commuting and staying alive is interesting, but without the why, mostly useless. Someone pointed out earlier in the thread that correlation does not necessarily imply causation. These results we are looking at, as an example, might be explained by something different in the air you breathe on each type of commute. My point is that we just don't know. More research is needed.
One interesting point in the Berm Peak video is that bike commuters get regular exercise 5 days a week for years on end. That kind of fitness discipline is not common.