@Shadow Dragon,
Hi Shadow Dragon,
Sounds like a very good idea to me.
I have taught Taijiquan and Qigong along with Yoga for many years and witnessed many changes to people's physical condition due to good health practices such as stretching, moderate movement, nutritious diet, relaxation and breathing exercises.
I have found that all of these health practices work together. This is why Asian health practices such as the ones I teach address all aspects as a unity -not separate.
In so far as relaxation of the mind is concerned, this is how I would explain it:
By way of example, clench your fist hard. Very hard. Now release your fist and look at it. It is white because of reduced blood flow. This is a demonstration of what tension can do. Your mind clenched the fist really hard and it created an obstruction. When there is an obstruction blood and energy do not flow. Blood and the energy that moves it are responsible for nourishing your body and also cleaning it out. If you are mind is under stress, it manifests in constriction in your body, which blocks proper flow, which in turn creates health problems.
So, relaxing the mind by relaxing the body, and vice-versa is one ingredient to good health. The other aspects are also integral. So, I would pay attention to everything.
Wish you luck and hope this helps.
Rich