This is exactly what I was talking about. I think the rest has become more important for me as I age.
I know what kinds of exercise causes retention and what causes me to actually temporarily lose. For example, last Saturday I rode 42 miles, with the 15 middle miles part of a ride DH and I were leading. That was stressful, to say the least, and although I rode slower than usual to the ride and during the ride, we booked it home in order to get back to the event for dinner. I ate with no regard to calories at the dinner, and woke up the next morning at my lowest weight since, well, the early '90s. I think as long as I am restricting carbs when not riding, and eating more vegetarian than not, my weight is more stable.