Thanks again for the many enlightening replies (and the encouragement) [ever notice that encouragement has courage right in the middle of it?].
I think that the weight training analogies resonate (pun intended!) most strongly with as far as breaking up the work load into light and heavy days and low weight/high reps vs. heavy lifting/shorter duration.
Bigpatg's post addressed the very concern that prompted this thread. I guess that the investigation of my changing limits will be a bigger challenge than I wished it to be
.
Muchas gracias,
Greg