It’s about time that you began to understand the secrets behind effective stretching. The secrets begin with understanding what the process is.
The first part of the process, in the first 30 days, is that improvements in your range of motion in the joint occur because you tolerate the discomfort more (aka Stretch Tolerance) NOT, because you have lengthened the muscle.
Law et al, 2009. Stretch exercises increase tolerance to stretch in patients with chronic musculoskeletal pain: a randomized controlled trial. Find here