[hnlmorg]

The commute was a form of exercise, I'd clock up several miles each day (most people don't drive into London. They usually take the train).

However I do completely agree with you about going for a run. That was the one commute replacement activity which I did find worked for me. Unfortunately the UK's weather often discourages one from non-mandatory forms of exercise. When it's raining, it is far easier to be motivated to walk home from the train station than it is to leave the house to go running. This is obviously a poor excuse but it is still the pragmatic truth of the matter.