The body's electricity and temperature make graphene magnetic. And this has to be related to the large number of dead athletes. When making great sporting efforts, their body temperature rises, and the heart goes to the top, which is the one that generates the electromagnetic pulses of the energetic torus that surrounds the human being.

When doing sports, suffer the pulses, and the electricity and temperature of the body increases.

Possibly by increasing the magnetism of graphene, it increases its electromagnetic wave absorption capabilities.

It only takes great effort, and an antenna emitting wave pulses to have a heart attack.