The Cubii was issued to me by the VA for being enrolled in the MOVE program. Mine looks like this one but I can't say that I like it that much. It was good when I first started exercising again when sitting was about all I could do.
https://www.amazon.com/Cubii-Elliptical-Adjustable-Resistance-Turquoise/dp/B074F1S194/ref=sr_1_5?dib=eyJ2IjoiMSJ9.7-nFM5q4sutFO8vheZspaR_gjNfF5N0zxpXz0xS1Xe9yIldj-ZgNRKg7HwGs2V1OBUsFDDlQeqtief2JTXOzDK_vyGSpk18qthyRb7FJ7r8FDWjRMx5VKUysODfqRjNEKLk8sflyuB-NMYGtU6uGkTFUlJ07oX9SMYbe-SgJTMjSh2DazgLhR0wSUXuq0cCzHmmOlIm9TgvpgJWBQLuj2_CrVOrUPowZrovsJ4JCtHs.rs-AvUNhTkN7oDNiu924kCP7CiMEagB1K4Z2-LHG4M4&dib_tag=se&hvadid=409982989382&hvdev=c&hvlocphy=1015844&hvnetw=g&hvqmt=e&hvrand=16991343789047164814&hvtargid=kwd-316736175784&hydadcr=26610_10407607&keywords=qubii&qid=1727709813&sr=8-5
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My triceps are either with a 5 pound weight or with an elastic band. I hold one end of the elastic band to the back of my head and straighten my other arm straight up. I turn my face away in case the elastic band snaps. Otherwise I lift the weight from my shoulder over my head. People do it a variety of ways.

Many people have problems with their shoulders but my shoulders feel great. I'm amazed that PMR didn't seem to do any harm to my shoulders because that was where most of my pain was when I was diagnosed with PMR. I couldn't lift my arms because my shoulders would hurt so much. I remember telling a physical therapist that nothing could hurt so much without doing some serious damage. My shoulders don't seem to be damaged at all.

My knees and lumbar spine have some serious damage but I don't think PMR caused it. Both of my knees have been replaced. I think inflammatory arthritis did the damage to my knees and spine.

I do an aquacise class Mon-Wed-Fri and the land exercise class on Tues-Thurs. I slack off on the weekend but I try to do yard work outside. I have to sit on the ground and scoot to pull weeds. Otherwise, mowing the grass is like using my rollator.