On top of sitting exercises (you could also lift things like tins or bags of food or even just lifting your arms and legs up and down as per those videos) definitely try walking around the house or ward if you can - walking is soo good for you, especially 15/20 minutes after eating, it’ll help you digest your food
@swimfeeders … thanks for posting those Swims … I’ve saved them on my youtube list. Sitting down exercises sounds just up my street … was diagnosed with RA last year and any prolonged walking or exercise knackers my knees now but I can tell they need some strenghtening.