Originally Posted by
greaterbrown
Take your bench at 45 deg.: If I just sit down on it, it moves me forward. But what if I move it backward? Then I have to stick my butt further back to make contact with it, thus tipping me backwards and taking weight off my hands.
You want your saddle location to be fixed for your optimal pedal stroke. If you are moving it forward and back to releive your wrists you will seriously mess up your pedaling and possible screw with your knees. And IF you were moving your saddle back it would put more weight on your wrists because you now have to lean further forward to reach the handlebars so your centre of gravity doesn't change much but unless your core is really rigid, you will be supporting your body more like a bridge than a cantilever.