Exercise overload

I've just booked a few (for few, read 5) classes at the gym for a week tomorrow. I had a count up my planner at the same time. I have 17 hours of classes booked in the next 7 days. Its got a bit out of control. The caffeine addiction will well and truely set in by the end of this week, if it isn't already.

That 17 hours doesn't include 4 hours of volunteering with horses, a rare night out on friday with gym buddies, walking into town (staying there to save petrol between gym & volunteering) to go to the bank & PO or helping a gym buddy out for about 3 hours with a project.

The thing is my body just keeps going, i never collapse with exhaustion, despite a restricted calorie diet. WTF is wrong with me?

I know 1 thing that is - my knuckles are still broken.... every so often i try & grip something and i can feel it. I can feel the lumps on the back of my hand & knuckles too. Mum grabbed my hand today while we were messing around & ouch, yes there is certainly a problem. However i can use it enough for the gym though so thats ok!