Bev Ratcliff, a fitness instructor, trained the cast during their grueling Spartacus PR tour last January. The Sparty Cast was: Andy, Peter, Lesley-Ann, Erin, Katrina and Lucy on her site which are pretty cool.
Bev Ratcliff, the fitness instructor, arranged free weights on a slab
of artificial turf, got on all fours and started yelling instructions
according the article in the NYTimes
You can now watch video of this session on Bev's Site