HS/SE5 iM

Hi team:

Anybody got suggestions for how to perform the Suspended Arch/Hollow Pull? The notes say any surface 8-12" high is good, but do you have any standard gym-equipment surfaces that you have used?  Failing that, any alternative mobility exercises?

I used something like this with a thin mat on top

https://www.amazon.com/Step-Original-Aerobic-Platform-Health/dp/B0007OWSXQ/ref=pd_lpo_vtph_200_tr_t_3?_encoding=UTF8&psc=1&refRID=C7F8QQAF6NEZJY4SJA5Y

I've successfully used both step class equipment and panel mats for these. 

Thanks, fellas!