Like you, I’ve “trained” my personal trainer and physio therapist and they are onboard with my very slow incremental progress. It’s been over 5 years and they never push because they know that could trigger a setback. At my recent neurologist visit, after the muscle tests, he congratulated me for being his strongest patient. I do a warm up every morning, core & weight training 2-3x week, and walk 20-30 minutes every 2nd day. If I feel tired, I take a rest day or two or whatever I need.