When I need a higher view to examine our immediate future, I stand up. Yes, I can still row, briefly, from a standing position. When I need a lower center of gravity, I get my butt low. My butt is connected by my spine to that hunk of granite between my ears, so lowering my butt, even for critical moment, lowers the weight of everything above my thighs. Essentially and effectively, we all carry our weight in the same place ... in our butts. And getting my butt (and hence, my shoulders) down gives me a lower place from which to row. A-n-d I've found it gives me a better position from which to panic-dive flat for an instant if things go totally kerfluey. I know that's bad form, but there are times ... When my brain leaves the boat, I'd rather dig in like an old wood tick than get washed out into the foaming deep. Being out of the boat is the last place I want to be. I absolutely hate being out of the boat. Sorry about the rambling; in my 8th decade it is unavoidable but it's a privilege granted by patient adults.