Hurt Knee: Double Under/Chest To Ring/TtB Workout

For time:
40 Double Unders
SUPINE CHEST TO RING, 21 reps
21 Ttb
30 Double Unders
SUPINE CHEST TO RING, 15 reps
15 TtB
20 Double Unders
SUPINE CHEST TO RING, 9 reps
9 TtB