What I notice if I haven't run for a while it is very hard to get started again; but it is quite easy to run for an hour at say, 7mph. Then do a short run of 15minutes at 9mph, build it up like this and you can run for an hour at that speed. I still have my bad and my good days, and diet is a big factor in how easy the running is. Never smoked; so I don't know about that. |