I LOVE CrossFit! I own an affiliate in So Cal, and I attend one in Monrovia. It is the most intense, fun, grueling and rewarding strength and conditioning program EVER in my opinion. Yes, it is intense, but all workouts are scaleable to you. Additionally, b/c it's in a group setting, you're more likely to "get the work done" than if you do it alone. And the people are VERY friendly and super supportive.