Want to live a long and healthy life? Just take a brisk walk daily for half-an-hour. A study in London has by the East Anglia University found that it cuts the risk of 24 illnesses – from cancer and heart disease to dementia. Researchers have found that bursts of regular exercise reduce the risk of osteoporosis, type 2 diabetes, depression, obesity and high blood pressure, apart from slowing down the negative affects of old age and cutting the risk of suffering from coronary heart disease and stroke.