Do you really need to stretch all your muscles? Not necessarily! Some people are already flexible enough in some muscles. A physical therapist can tell you which ones are most important for your body. Usually the quadriceps and calves are most important

What do you need more of- strength, flexibility, stamina, power?

​It really depends on your body and what your goals are. A professional evaluation by an orthopedic physical therapist can  determine where your deficits are and then give you strategies to work on those goals. Everyone needs at least one but usually multiple categories addressed. You may be wasting time pursuing one category when you should be focused on another. 

Dr Rick