Living with medical issues causes some adjustments obviously depending on the issue. I travel solo with both knees replaced in the last year, Type 1 Diabetic, Sleep Apnea and just had Cardiac Ablation at 68 years of age. I cycle outdoors 250 miles a week, go to the gym 3 times a week, do all the remodeling of our house and do most of the maintainence on my motorhome as well as wash and polish every three months. After TKR I was back in my office in 4 days, started PT at that time 3 x a week for 5 weeks, back on my bike 4 weeks after surgery going easy, then quickly increasing my rides as well as all activities. Life is too short and too interesting to limit yourself.