Originally Posted by
playera
It was once described as the same as running a marathon, every day for three weeks.
In energy output that's probably a fairly close analogy. The difference is cycling is not wieght bearing, so you r body doesn't take the same beating.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.