Recently started 'Wim Hof Method', which includes some Yoga exercises. I also started doing Yoga from various youtube channels. Tried some difficult ones and I could barely do 80% of what instructors can do. Also,back when I trained Uechi we did some Yoga there too. It's kind of crucial to never force yourself and go easy. Less chance of injury and the progress is actually faster that way. There are also many Yoga exercises for injuries like strained neck, lower back, etc. Those are really helpful and gentle. Yoga also got me meditating again after a long time.