paperclippy - I find the same thing with treadmills! Maybe it's because they force you to keep a pace: you can't slow down and speed up as often as when you're running on a track? I also find that I can run WAY faster on a track with the same amount of effort, which is always nice when I'm timing myself

. I gotta say, congrats on your fitness accomplisments! It sounds like you've come a long way
Monday:
1 hr bike ride
30 min circuit