I've been doing hollow body rock and just started Arch body rocks.
Untill I hit the full hollow body and now the arch...the speed hasn't worried me too much.
But now I'm keen to move on...especially with the arch bodies! UNPLEASENT!
I can rock really slow and almost hang at each extreme...or keep the momentum fast.
At the moment my 60 hollow bodies, take about 2minutes to complete...too slow? I can do one set of 60...then 4 sets of 30 currently.
How long does a set take you?