Thanks so much All
Your interesting and helpful suggestions have helped a lot. Made me pause and think more clearly about all my options and what would work best for me.
As many of you noted, motivation is a big deal.
I'm now leaning towards a foldable, manual treadmill and an aerobic step platfirm. These will fit in my flat and they won't burn electricity,
Meanwhile, I'm rediscovering my exercise ball that's been sitting neglected in a corner ever since I bought it.
I came across a video on the benefits of doing rebounding exercises on a Yoga Ball. And it's working!
This is my second day trying it out and I already feel a difference - more energised, less achy.
The best part - it's easy to do and enjoyable. I
I feel motivated!