Originally Posted by DrPete

Having been someone with lots of low back pain before I learned to roll my pelvis forward, I'd say keep the pelvis rolled forward unless there's some compelling reason not to. Everyone's different of course, but for most folks a straight back is better/less painful than a bent one. Lance has a bend in his back when TTing that just looks excruciating, but obviously it works for his body. I wouldn't use this as a time to imitate a pro, though.