@jeannesf1 After 40 years, I’ve found the SciFit recumbent stepper works for me. I use it at the lowest level and have worked up to 30 minutes. No pressure on joints and I’m not dealing with the usual post-exertion malaise, flu-like muscle pain. My YMCA has 3 such machines, our Senior Center has two, and the PT folks also have one. Watch it in use online. Search SciFit recumbent stepper. I think NuStep makes one, too.