Help, What are those icons?

[final lap]

Sometimes while playing, one of my players gets an icon above him, it' kind of a purple triangle or something. What does it mean?

Thanks

 

[kem]

็ำHe's tired

 

[final lap]

actually I noticed that it is the same player marker icon but with a red outline. So if you are player 1, it is a blue marker with red outline. Dunno if I am explaining this correctly. Is this what you mean?, that he's tired?