Not a recommendation. Paywalled here: https://www.thetimes.co.uk/article/...2-was-the-darkest-period-of-my-life-vxt5gftcx
From his website, http://www.jumpyourperformance.com/ And that's the only mention of CFS or ME. His bio then ends with ME, or over-training, who can really know?
To put this into context, 16 metres, the distance he was jumping when he supposedly had ME, is further than the female world record of 15.50 metres. The fact that he was still jogging and jumping further than any woman has ever jumped in history suggest that his physical function was nowhere near the threshold for a diagnosis of ME/CFS, even using Peter White’s criteria of a score of less than 75 on the SF-36 physical function scale). And the fact that he appears to have made a full recovery by “battling” his symptoms and continuing to train suggests that he did not have PEM and that he should therefore not have been diagnosed with ME or CFS – if indeed he was. NB I’m not criticising Nathan, only those who have advised him that he had ME, and those who have contributed to the muddle and confusion that surrounds the diagnosis.