Broadly speaking, healthy movement requires both MOBILITY and STABILITY. Mobility is the capacity of each one of your joints to move through their maximal ranges. Stability is you ability to control those given ranges via your muscular and nervous systems, in various positions and environments.
One of the things that I'm looking for when I assess my patients is whether or not their movement dysfunctions are mobility or stability-based. It matters, because addressing a mobility deficit with a stability intervention (or a stability deficit with a mobility intervention) is likely going to have you spinning your wheels. You may find short-term relief while not being able to make long-term, meaningful progress.
Here is a quick example. If someone feels as though their hamstrings are constantly in need of stretching, yet they can easily reach their toes with their knees fully extended in standing or long sitting, then mobility isn't necessarily that person's issue. Their hamstrings might feel consistently tight because they are constantly firing to offer missing stability elsewhere in the kinetic chair (e.g., the core/trunk). In this example, the best approach would probably be to back of the constant hamstring stretching and instead to focus on stabilizing the deficient core musculature.
Find out what is or isn't mobile/stabile first, and then you'll better be able to design a proper approach towards improving your movement.
Here's a quick way to see if you're a hypermobile individual, meaning that your joints (due to genetics) have plenty of mobility already and therefore do not require a mobility approach. If you find that you can do these moves, the best approach would be to get to work learning how to stabilize your already mobile joints.
