sara orchard explains.s an extreme triathlon, with the emphasis on extreme. competitors start the race with a 2.4 mile swim and move on to race with a 2.4 mile swim and move ontoa race with a 2.4 mile swim and move on to a 112 mile bike ride and finally run a marathon, all on the same day, without a break. last week at the world championships in hawaii, 24—year—old lucy charles finished second on her professional debut. it was my first ever time at the world champs as a professional triathlete, so to make the podium was kind of, i thought, way out of reach. to actually finish second was way outside of what i thought was possible. home again with her boyfriend and coach rees, training is back under way. but their bedroom has a new addition. we have just re ce ntly has a new addition. we have just recently purchased an altitude tent, which enables you to sleep at high altitude, which supposedly is meant to help with endurance performance. what's it like in there? it is actually surprisingly cosy, which is qui