I thought about investing in a Max Muscle franchise once but its a tough way to make it. The problem isn't the resistance trainers its the common public. They lie to themselves LONG AND HARD and if you don't feed it to them a teaspoon at a time, they will never change their lives.
Take Atkins, the guy says "eat all the red meat you want, just cut the carbs". That's borderline retarded but he sold more product than any of us can imagine then has a heart attack. meanwhile his clientelle are barrelling like a runaway frieghttrain into diabetes, heart problems, joint failure, bad backs, you name it. 35-40% of this country cannot stand to see themselves naked.