Never quit strength/resistance training. Modify to suit your age. Of course, if you are injured, take a break.
Have done that quite a bit in the last five years or so. Bit easier to "shop around" and look for different exercises and machines since the LifeTime I go to has a vast array. At 70-something I've dropped bench press and militaries because of the tears in my rotator cuffs (and a bit of arthritis) . Plenty of dumbbell exercises and chest machines with grips that are more rotator cuff friendly. Also the prescribed rehab exercise for the shoulder are something I do three times a week and they keep the shoulders mostly under control (ie: sore/achy but not painful). I don't lift that light for my age and size (155 LB) but don't really care about the "weight" numbers, just the number of reps I can do with good form.