Endurance WOD Workout

For 50 minutes with slow pace:
Run/ski/bike/row for 2 minutes
30-60 s hollow hold
Run/ski/bike/row for 2 minutes
1 min DB waiter walk (30 s per hand)
Run/ski/bike/row for 2 minutes
30-60 wall sit
Run/ski/bike/row for 2 minutes
12 cossack squat w/ 1 s hold at bottom
Run/ski/bike/row for 2 minutes
25 m quadruped crawl