Kick Boxing

Tonight I went to a kickboxing class with my sister in law. This was my first kickboxing class and before I went into the class I thought hey I am in shape and young, this will be easy.  It started off easy enough with some stretches and a couple of kicks to the bag, but then when she had us do double time, that is when the burning in my legs started. When we moved onto the left leg I thought it was going to give out! Earlier in the day I had ran 2 miles and then worked my abs and arms out, so I was pretty tired.  Towards the end of the class I was a sweating machine.  It really felt good to work out again, but now I can't sleep :(