I get the muscle loss issue.
For me. basically not being able to do much for 7 months now, has not helped me much. I do what I can but I doubt at over 70. I will build much back. I just try to stay flexable.
Yep stretch that is key to flexibility. Get some small barbells and just do a couple muscle group exercises 2-3 sets no more than 15 reps. Start small and build up to a point you add weight. You'll feel better in no time.