A young man's death could be attributed to playing Xbox "Halo" marathons for up to 12 hours at a time.

Chris Staniforth, a 20-year-old Brit, died in May from deep vein thrombosis, which is a condition triggered by sitting for long periods, and often occurs in people who sit through long flights.

In Staniforth's case, a blood clot formed in his leg and moved up to his lungs and caused a fatal pulmonary embolism, according to a coroner.

"After my research I saw there was no difference to Chris sitting at a desk on his Xbox and someone on a long-haul flight," David Staniforth, the man's father, told BBC News. He is now warning game lovers of the dangers and health consequences of playing too long without breaks.

Deep vein thrombosis symptoms include swelling in the leg where the blood clot forms, chest pain, shortness of breath, and dizziness.