We spend so much time kipping in Crossfit it only seems to make sense to regularly practice our hollow/arch. And if you aren’t a crossfitter, doing the hollow and arch holds will only make you stronger.
6 rounds of:
10 Tuck Crunches
20 Second Hollow Hold
20 Second Arch Hold
Make sure for both the v-ups and the tuck crunches you are not over-extending the low back. The goal is to be as flat backed as possible.