It is "comfy" I suppose, as they are used to it and the bikes are set up for them to be able to raceAhh ..I'm pleased about that..I thought I needed saddle penetration to improve my road bike set up @Marmion
I'd struggle to give a definitive sciency kind of physiological explanation what forces are in play to bring the bum forwards on the saddle but you often see it in TT events and aero position stuff in track events together with the regular shift back to the rear of the saddle. Mind, when they're pushing out several hundred watts, there can't be much residual weight on the bum anyway.It's called "on the rivet" from the days when there were rivets on saddles. They are racing, that's the reason. It's not supposed to be comfy.
I always found that the best aero track position was further back on the saddle, although edging forward helped when getting a bit knackered.I'd struggle to give a definitive sciency kind of physiological explanation what forces are in play to bring the bum forwards on the saddle but you often see it in TT events and aero position stuff in track events together with the regular shift back to the rear of the saddle. Mind, when they're pushing out several hundred watts, there can't be much residual weight on the bum anyway.
There you go, get on the rivet...I thought it maybe a circulation position to help with blood flow to the legs..
I do get numbness in my backside riding in normal seated position.