As well as exercise, other issues are important for our health, such as diet, smoking(not) sun protection. A healthy diet is just as important as exercise for good health. An ideal diet is known as flexitarian, where most of the diet is fruit and veg. But with only two to three portions of meat per week. Minimising meat means one still gets enough iron but reduces saturated fats intake. Minimising meat intake is also the best thing people can do to counter global warming. Meat portion size is the size of your own palm). Red meat is best for iron, but chicken is also good. Removing the skin from chicken reduces the saturated fat. Also: Reducing saturated fat is the most important Wholemeal carbs for fibre Increase Omega 3 by eating oily fish, such as Sardines, two to three times per week. Also Walnuts, Linseed and Salmon are good. But watch out on the Tuna as, although it should be ideal, it often has low levels of Omega 3 and can contain too high levels of Mercury pollution. (Omega 3 calms inflammation in the body). Best oils are Sunflower or Rapeseed oil. A few nuts are great. Reduce "empty" calories; i.e., food that has little or no nutritional value and only contains calories in the form of sugar, alcohol and fat. Take in more calories than you burn and the excess will be stored by the body as fat. Smoking is very bad for health. Protect your skin from intense sunlight. (Vitamin D supplement can be a good idea).