Your nervous system is what signals muscles where “normal” is held. To safely advance your set point range is with (progressive) resistance, gravity, ground reaction and with movement.
To begin, active stretching must be performed with some guidance of the functional tolerances under the control of reciprocal inhibition, stretch reflex, current active range of motion, and finally, functional need. To address, focus should remain on the eccentric loading, or lengthening, ability of your exercises.
Highly repetitive movement in ranges outside of normal without a well devised plan to first improve personal base strength may only increase the working force (effort) against moving with safety and effectiveness.
Simply stated, dynamic movement and loaded/resistance exercises is how progress is made for the carryover to both life and sport longevity.