8 minutes (or ME) plank hold:
You may rotate between front and side planks (on elbows) as many times as desired. Exercise ends when knees hit the ground and/or spine is no longer neutral.
4 rounds of 5 minutes work : 1 minute rest
Partner A - row for calories
Partner B - AMRAP
1 Wall Walk
8 Goblet Squats
16 Double Unders
Partners switch after the rest and continue where their partner left off.