english: It's estimated that, on average, prisoners spent six  or so hours a day on treadmills, the equivalent of climbing 5,000 to 14,000 feet.
non_english: Procenjuje se da su zatvorenici u proseku provodili oko šest sati dnevno na traci za trčanje što je jednako penjanju na visinu od 1500 do 4250 metara visine.