The gym and the treadmill is a good idea. But the problem is we spend so much effort in marketing messaging, deluding people into thinking if you get on your treadmill or you go to the gym, that's what you need. People who join a gym, the vast majority of them have quit within nine months and almost all of them have quit within two years. So if it's a longevity strategy, does not work.

So learning to play a new instrument, learning a new language - those sorts of things will pay dividends for years or decades to come.

The beauty of moving naturally, i.e. walking and gardening, is they're low impact. You're less likely to fall down and break a hip. Setting up your life so you're nudged into general physical activity every day is a strategy for your entire life from age 10 to 100.

The longest-lived people eat a plant-based diet. They eat meat but only as a condiment or a celebration. Nothing they eat has a plastic wrapper.

Deepen your existing spiritual commitment.

Select your friendships carefully. Gather people around you who will reinforce your lifestyle.

I think we need to think about our physical activity as a reward, as something enjoyable and something we look forward to doing, not something that we regard as self-flogging.