At sixty-eight I find my own moderate amount of exercise suits me, and I don't worry too much about diet provided it is balanced. I do about an hour a day of exercycling, half an hour of weights and springs, mow my kikuyu grass with a hand mower, do plenty of manual labour and walk a mile or two every day rather than drive. I eat an ordinary diet of meat or fish, spuds or rice, greens and plenty of fruit. I don't think about any of this as it seems to work all right. If I fancy a sweet dessert, a cake, a brandy, a bar of chocolate, then I have these things, but in small quantities and not every day, or probably even every week. As I see it, it's all just about moderation and common sense.