ProRaceMechanic, correct and correct again. I have the saddle set back and have a tendency to sit back. It works fine when going uphill, but on the flat, then yes, I think it is inefficient and one of the reasons why I do worse on the flat (that and crank inertia). I try and sit more forward, but end up sliding back. I was having the debate on the trainer over the weekend as to whether I should set the bike with the saddle at the optimum height, but then, as I won`t ride that way on the road, is it worth it, and will those different neuron firing patterns confuse my body???