Deep tissue massage is basically somewhere between swedish and sports massage - very basically!
I have a policy of less is more, and "No pain to gain the most". Once the pain response is set up, the body guards against further pain by restriction and reduction of movement and blood flow follwoing initial activation.
So while I will use my full bodyweight, it is spread over a larger area through my forearms, or using your body as a pully/lever/machine, and my elbows will provide more pressure that is more targeted, but I work carefully to ensure that we are not infact causing more muscle fiber injury or bruising. To support this, when using deep tissue techniques, I work slower that some therapists, which allows your body time to understand what I am encouraging (relaxation), and gives it time to release the tension before we get to the point of forcing. I work more on a suggestion and requst basis than demanding compliance.
This allows the body to work out how it can best reach release and relax, facilitating the ability to self regulate areas of high tension, and thus, learning how to heal its self.
I also invite you to connect with your inner invoronment, interiospection, so that with conscious awareness you can learn to mindfully direct your body into more relaxed states - using the power of your mind - because its a great and under used resource!