Here is a video on a simple "work out" routine for the joints, done from a neurological perspective.
The author, Garrett Salpeter, is founder of "Neufit", which is an absolutely amazing e-stim (electromedicine) device (along with specific physical therapy) for muscle strength and recovery. If you have an opportunity to go to a clinic that has his equipment, it is well worth exploring! It is quite different from things like tens unit therapy, as you are actually actively engaging the muscles (moving them) while using the e-stim device.
The unit is first used as a scanner to find the actual cause of the muscle issue. The electrodes are placed as indicated which removes the guess work of trying to figure out exactly where stimulation would be beneficial. Results are dramatic and almost immediate, although repeated therapy sessions are usually required.
The difference? It is all a neurological practice, completely different than trying to over-stimulate/strengthen/wake muscles with electrical current.
While this post isn't specifically about e-stim, I wanted to give some background as to why this gentleman and his work is unique. And yes, from the video I know and see that he has a forward tilted pelvis and a bit of a bow in his legs. But he's not your typical personal trainer or muscle head, so ignore all of that! He's a computer geek that developed an interest in the spacial relationship between the brain, nervous system, muscles, and movement.

In the video below, he teaches a set of very simple joint exercises that works to retrain the brain and central nervous system. These are "spatial recognition" mobility exercises that correct the brain's' misconception of where in space/time the body actual exists. They are deceptively easy to do, and can make a profound difference in muscle function due to modulated/corrected neurological function.
I love the difference in his approach to physical therapy. His unique perspective adds exceptional value, especially for those who are already experiencing neurological challenges! As we age, we all start to experience neurological, spatial-relationship issues.
This gives me a new perspective on how practices such as Tai Chi and Qi Gong work from a neurological standpoint.
https://drive.google.com/file/d/14ckhjcA3CVSvF21KAgYkd5sVWHJ8KDU_/view