Hi Marc - know the feeling.
Your fitness will increase as your body adapts to the training, but perhaps you could plan light & heavy days? That way you're still getting in the same amount of training, without burning yourself out.
On the off days, I've found that using icepacks on areas that ache/getting a hot bath or massage, and gentle stretching in front of the TV all help. Also, try a little time release ibuprofen before bedtime if your aching muscles are keeping you awake as you need the sleep to recover properly.
If you're hating the idea of training, it's time to take a little break - you can't eat an elephant in one sitting
