A 2-part workout with the first part a really tough cardio test you can do with a partner and the second a test of strength.
Run 3km @in a weight vest 10/6kg
burpee pull up's
thrusters @30/20kg
you can jump on the rower at any point but you must complete 1 full round etc the full 21 burpee pull ups
partner A - completes the movements first (burpee pull ups, thrusters)
partner B - on the rower
Find your max clean + jerk