How would I exercise control over mind and body?

This question is highly metaphysical and probably unanswerable but I’m trying to exercise control over my mind and body. I want to be able to enter a meditative state or something of the sort where I can relax and focus at the same time but I’m not sure how. Any tips, suggestions?

A mind-body exercise is a physical exercise that is performed with an intense focus, that utilizes four principles of Pilates: Breathing, Precision, Control and Concentration.When performed correctly; Yoga, Tai chi, and Pilates are traditional forms of mind-body exercises.
mind -body exercise is” the conscious control of all muscular movements of the body. It is the correct utilization and application of the leverage principles afforded by the bones comprising the skeletal framework of the body, a complete knowledge of the mechanism of the body, and a full understanding of the principles of equilibrium and gravity as applied to the movements of the body in motion, at rest and in sleep.”