I do strength and conditioning workouts 3 times per week. I have my own 300 pound barbell, kettlebells and gymnastic rings. I train at home or outside. There is no need for gym membership. It's a lot cheaper to buy your own stuff and excercise at home. I've heard about cycling and bone density but I don't know if it's true or not. The main reason why I strength train is because I want to maintain my fitnness.