Some effective Plyometric Core Exercises:

Medicine ball sit up

Medicine ball sit up throwing ball to partner

Medicine ball overhead front throw to partner

Medicine ball overhead backward throw to partner

Medicine ball speed twist sit up

Spiderman crawl on floor

Drop pushup

Drop pushup/jog interval

Jump squat and thrust

Seated medicine ball twist and throw

NOTE: Perform 3 rounds consisting of 60 seconds with break between rounds. Vary duration and break time. Or perform 3 rounds consisting of 15–25 reps with break between rounds. Vary reps and break time. Medicine ball can be rebounded to a wall if available.