Hi I'm 12 years of age and I'm sorry for your loss!
I have an xbox as well I go on it quite often sadly when you go on a games console ( xbox ) its very hard 2 keep track of time. Also it's extremely hard to turn the console off, to make matters worse when you are gaming you don't feel hunger or thirst which makes u dehydrated and gives you headaches.
It's totally true what you said in the sun newspaper, that persons should have breaks and get some fresh air in your system (at least every half an hour you spend on u should spend off)
Thank you for raising this issue, I'm now not going spend as much time on game consoles. My heart is with you all and god bless.