I have spent a lot of time studying and trying different methods to improve my physique, If you have suffered from injuries in the past like myself it might be wise to drop the load and concentrate on the tension placed on your muscles.
Perfect execution of an exercise will place greater tension within the working muscle, when loading up on an exercise eg. the Db chest press a lot of people end up placing the load and tension on the wrong muscles because the load is to big and the execution and set up of the exercise is poor.
If you perform an exercise properly you should feel the muscle throughout the set.
Book in with me now if you would like to learn correct technique and perfect execution on exercises.