A grieving father is launching a campaign to highlight the dangers of excessive computer gaming.
David Staniforth's son Chris died a year ago from Deep Vein Thrombosis. He used to spend up to twelve hours a day playing computer games, and his father believes this caused his death.
He has a website which encourages people to take regular breaks when gaming, but also wants games manufacturers to highlight the dangers of long periods of sedentary activity on their products.
Professor Beverley Hunt says that DVT can hit unexpectedly