Anyone who is looking for a good workout program to do should consider this option. Krav Maga is a good self defense class and a great workout. It is a lot of work but it is worth it. Here is a website you can look at that supports the classes. Its a karate school but you don't need to be good at karate to do this. It is for ages 13 and up but I recomend you be a little older than that.
www.victoryma.com click on programs and go to Krav Maga. You will love it.