Burpees. Core strength + cardio, all in one painfully simplistic exercise.
In rehab'ing my back, I did 2 things:
1) Bosu-ball exercises: most of these will work the core due to the instability in the ball. It is also great for fast-twitch muscle development which helps with balance. Push-ups with the ball inverted and one-legged stands are killer.
2) Pilates: this has been the key for me. Everything focuses on core strength when you do it on the reformer machines (always moving = always engaging the core). It has also helped build lean muscle and I'm dropping weight pretty quickly now. I can't say enough good thins about pilates.
Squats, Dead Lifts, Cleans, Kettle Bell Swings, etc
I appreciate the feedback.
I have started on the Stronglifts 5x5 programme. I am currently doing a daily body resistance programme and basic plyometrics, mainly as a warmup to my ju jitsu training. My body resistance exercises include pushups, heaves, squats, lunges, situps and crunches, I normally finish this off with one or two basic plyometric exercises. While doing the Stronglifts should I wind back on this or not?
You'll probably be ok to start off with, but as the weight gets heavy, you may find out that you really need the rest days between weights sessions.