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Just to add marathons also have issues of hyperthermia - people can consciously push their exertion beyond biological safeguards, especially in marathons where pacing removes another safeguard in that people usually self limit/regulate their activity levels and but keeping pace pushes past this
Re sleeping bags, good to know, just my two cents from following event medicine, this being the first ultra I've ever followed
Just a concern that in a field where pushing yourselves to extremes is rewarded, not everyone will be able to hit these levels of focus/exertion safely if sport keeps growing - I'm also coming from a safety conscious perspective of worrying about the long term health effects - might sleep deprivation be seen in the same light as repetitive concussions in sports?
Otherwise smashing ride! - I still appreciate how these races show an aspect of human performance and grit like nothing else and wouldn't want to see that watered down
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Nerv
Link? Caffeine is one of the most used, if not the most used and one of the most tested drugs available.
Most deaths in marathons I've read about are things like unknown heart conditions being exposed when relatively low-trained runners are overworked in marathon conditions. There was also the girl that died on Jack3d supplement that contained ephedra or DHEA or some other stimulant but it wasn't caffeine.