TRX is an excellent resistance training tool that uses bodyweight. It is employed by the US Military for combat conditioning.
Testimonial
I first heard about this class from my husband. He had been going to this class for some time and recommended it highly. I wanted a class that would teach me self-defense and give me a good workout at the same time. This turned out to be the class. The instructor is very skilled in teaching self-defense. He teaches techniques that are easily adapted to real life, and is so well organized that he finds time to fit in a great workout. I didn’t have any martial arts experience so I was a little nervous before my first class. Five minutes into the class and that nervousness was put to rest. It is a very friendly atmosphere and geared toward all levels of experience, or non-experience, as in my case. I find the pace very comfortable with lots of encouragement. I feel confident about the skills I’m learning, my fitness level is increasing, and I feel invigorated after each class. This is definitely a class worth recommending.