ahiṁsā-pratiṣṭhāyaṁ tat-sannidhau vairatyāghaḥ ||Yoga Sutra 2.35||
When ones relationship with another being is based on ahimsa, the other being drops all resistance in the relationship and all cooperation will be effortlessly forthcoming!
This is a great guide for ones relationship with ones body. Consequently if ones relationship with ones body is based on ahimsa (perfect understanding of the body's grammar and all interactions being based on that), then the body's cooperation will be received! If one has not practiced ahimsa with ones own body, ahimsa in other relationships will be hard.
Correct asana and pranyama practice will let one discover the body's grammar.