Work up to a heavy 3 rep effort back squat.
Then complete 1X20 reps at 70% of that weight.
Then complete 1X20 reps at 70% of that weight.
On the 15 minutes x 3
30 KBS at 16kgs/12kgs
5 clockwise runs around the gym
30 lunges with KBs held Overhead 16kgs/12kgs
5 clockwise runs around the gym
10 sandbag cleans 100#/70#
5 clockwise runs around the gym
10 burpee over the bag 100#/70#
5 clockwise runs around the gym