Anyone else come across this extreme endurance influencer? My 15 yr old is obsessed with fitness, regime and self-discipline. Today he was tearing him self to pieces with anger directed at himself (and us) for having slipped on his goals. He's 'cut out dopamine' is isolating himself from his peers and withdrawn. Please, any relating here? Any advice? Thanks. have raised with school but because he's good there, they aren't interested. Took him to GP to discuss food when that was becoming a problem. The only thing I can of is to get on with Mr Goggins myself - 51 yr old mum - might put him off...