RTFA?
The cause of death is being investigated by police. It's believed prolonged sitting created cardiovascular problems.
I had and the topic started turning to fat and weight and I chimed in on that. As for the prolonged sitting creating cardiovascular problem theory, I don't believe that was the main cause of death.
For counter evidence, I present the case of the woman who sat on a toilet for 2 years to the point her legs had shrivelled up from being numb and non-use and her body had begun to grow around the toilet causing rescue workers to have to remove the whole toilet and surgically remove it from her.
If sitting for a long period of time causes such severe cardiovascular problems as to cause death instantly then I don't see this lady as being able to survive that long sitting down.