A couple of circuits that I'm going to work with over the next couple of weeks.

Day 1 Core
5 rounds of:
L-sit & Bridge circuit
3 rounds of:
20 Band Twists (10 per side)
15 V-ups
Chinnies
1 min rest

Day 2 Core
15 JS Band Slams
15 Lying Hip Swings
10 Supermans
1 min Plank
1 min rest

Isometric Workout
5 rounds each for 5 sec contractions @ start, mid & peak contractions of:
Deadlift
Overhead Press
Snatch