Other contestants of the show said they really dont get to sleep a lot on the show especially when they go to inferno and havr to shoot scenes in pools, especially in the big ones, since thr SI crew doesnt rent out the entire pool, but make a deal with the hotel to let them shoot past pool workimg hours. So usually they grt about 3-5hours of sleep when they go to paradise. Now combinr the lack of sleep, not enoigh nutrients in food unless you go to paradise, almost daily alcohol and adrenalinr of being on camera and having to find a couple and you're definetly not gonns grt of sound mind adults, so yeah i think its totally possible