This coming Sunday over 50,000 people will be taking part in the London Marathon; that’s just over 26 miles of blood, sweat and tears – and then adrenaline, as the runners cross the finish line.This coming Sunday over 50,000 people will be taking part in the London Marathon; that’s just over 26 miles of blood, sweat and tears – and then adrenaline, as the runners cross the finish line.Read MoreHealth News | Mail Online