Hello,
First sry for my english, it's not my native language. I've made F1/H1 for while now and want to begin with the stretch series. For now i can only buy one of the courses. I'm very stiff in my shoulders, hips and hamstrings. I think thats because of my job, where im sitting the hole day for nearly 20 years now (im 39 years old). What do you think which is the best course to start?
I will buy the other two after christmas.