Healthy Inside

Michael discovers how to keep bodies healthy on the inside, meeting an 86-year-old cyclist in the Surrey Hills who has the immune system of a 20 to 30-year-old. In Hong Kong, a scientist has discovered that the ancient Chinese practice of tai chi can be a better way of losing weight and lowering cholesterol than more vigorous exercise. In Cilento, southern Italy, Michael visits a tiny village that has one of the highest proportions of centenarians in Europe.