My biggest challenge to continuing with a regular fitness routine over several decades was motivation. Next would be ease and convenience of doing the exercises. In ways they go together. Now, at 92, I’m more in control of my time and can more easily fit exercising into my day.

As I get older (92 now), I think how great it is that I can run around, mow the grass, rake leaves and climb the stairs endless times a day.

If you look forward to your next exercise session then it probably means that your last session was good. So don't push: be comfortable!