Not Cathe here, but I have had the same issue in the past. I don't remember what the move is called but Cathe does it in several LB workouts -- lay on the floor on your back with 1 foot on your step platform and the other leg straight up in the air. Put your weight on the leg on the step and raise your hips off the floor, then lower your hips (but don't touch the floor), repeat. Cathe usually does slow reps (either sets of 8 or 16), followed by quick pulses (again another 8 or 16). Switch legs, repeat. That works the hamstring really well. To make it harder, you can put your foot on a stability ball instead of a step topper. Hope this helps!
