doping Researchers have been quietly collecting urine samples at ultramarathons to study drug use – here's what they found The purpose of the study was to compare the methods of sampling against questionnaires to gather data “I’m utterly bewildered" – trail running world champ denies doping allegations after positive test Norway's Stian Angermund says he has no idea how he could have tested positive for banned substances Advnture NewsletterAll the latest inspiration, tips and guides to help you plan your next Advnture!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1This Altra Olympus 5 is one of the most popular shoes among Appalachian Trail hikers – get them up to 30% off right now2Struck down by altitude sickness, 2 hikers signal for help just before cell phone batteries die3World champions decided in tense Climbing World Cup final in Seoul4Jimmy Chin's "monumental and emotional" discovery of body on Everest may finally put mountaineering's most enduring mystery to rest5Montane Cetus Lite Waterproof Jacket review: the first jacket with a new sweat-regulating technology
