Stronger core makes a stronger fighter

From Rachel:

Promised I would send this out to everyone. You can do many of these without the exercise ball, so don't use the lack of one as an excuse!

I can also say that if you only do four of the exercises (squats, push ups, lunges, and plank... and if you can with five to the triceps dip) it will still be a tremendous help.

Do 3 sets of 10 reps of each exercise to start. I recommend alternating between moves in pairs (do 10 reps of one, 10 reps of another, back to the first one, and so on...).