Although I try to always get some aerobic exercise daily, the main thing that I do for general wellbeing is yoga. This consists of a warm up period, a twelve minute routine, then the same routine with longer holds, which takes about half an hour. Then, an optional meditation session.

This may seem like a lot, but I have been doing it for a long time, and have built up to this.

Yoga is about flexibility, balance, posture, relaxation, and so on, but everyone would benefit from doing stretching and warming up properly before exercising, as this minimises the risk of injury, and increases muscle power by a terrific amount. Also, stretching out your muscles after exercise puts you in good shape to prevent aches and pains, or cramped muscles, if you have had a heavy workout, or just gone for a brisk walk. That's why professional athletes do it! Give it a try.