I hope I didn't come across as "anti-exercise" in my mini-rant the other day; if it makes you feel good, by all means do it!
I just don't want people to feel guilty if they find that they don't have the energy to exercise - I tell my family it's kind of like a phone battery or a laptop battery; the more you use those devices, the faster they run out of juice. You can't do "condition training" on a phone battery; when it's dead, it's dead. If you don't recharge it, you can't use your phone.
MG'ers are the same way - only "dead" might really and truly mean DEAD. No recharge, no do-over, nuthin. If our batteries run out, we're pushing up daisies.
And then they'll feel bad, huh?
*does best imitation of sulking 5-year-old*
P.S. Don't think of it as "lazy" - think of it as "conserving energy"....