Originally Posted by
Jax Rhapsody
I once had a bike with no saddle or post(I don't remember why), and it got old after a while of riding, each time I took the bike out, plus extended out of saddle can hurt your back.
I have the same problem. It seems the only way to avoid it is to stand as upright as possible or break the effort down to much shorter durations.
The Pantani stance is quite back crunching. Although he did break it down few minutes at a time, taking much shorter "breaks" in between pedaling seated. That makes it much more manageable without compromising power and very less likely to hurt the back.