71 y.o. here. About a year ago or so, at the beginning of "cycling season", my saddle adjustment on my road bike just didn't feel right, after riding it the same way for several years. Lowered the nose just the smallest bit, and that's all it took. I also ride off-road, and the saddle on my mtn bike (diff brand saddle) is slightly up and did not need changing. Maybe because the mtn.bike has a more upright rider position? Wouldn't it be nice if our bodies remained the same as we age. BUT-ain't gonna be that way!!