Gym 101 owner Rob Binns believes standard training routines and excess bulking-up are causing many of the injuries suffered in contact sports like rugby and league.
"The problem is they work the muscles harder than they can see in the mirrors - the beach muscles - chest, abs, arms," Binns said.
"The back muscles get missed and as soon as you have an imbalance between the two opposing muscles you have a weakness and that is when your injuries are going to come in.
"There are a lot of rotator cuff injuries due to the strengthening of the shoulders. They are doing a lot of exercises with the arm extended which makes the shoulder weaker. Everything we are doing is working an area to keep the shoulder joint supported."
Binns says all the rugby gym training is linear through the bench press, lat pull down, lifts and squats but the game's impacts are not.