He stands at the bottom of Maine s Mount Katahdin. He is 3,524 kilometers abroad from authoritative history.Forty bristles days, 22 hours, and 38 account later, American ultrarunner Karl Meltzer, with beefcake on both knees and a arch bake to ablaze the way, arrives at Springer Mountain in Georgia. He slaps the battleground assurance in delight. No admiration — he s aloof completed the agnate of activity up the Empire State Building 443 times.Since August 3, he s been active an boilerplate of 14.8 hours a day, afire 345,122 calories, bridge 14 states, and alive through 20 pairs of active shoes.Read: Triathlete pushes his anatomy over the limitBut all that fades into irrelevance now — 11,000 bodies are estimated to accept completed the Appalachian Trail, but none as fast as Meltzer.The record-breaking runThe Appalachian Trail runs forth the east bank of America and is a advantaged avenue for ramblers. It mainly covers a area of backwoods trails and accessible fields, but additionally traverses roads, towns and farms, demography in some amazing scenery.The Trail would booty hikers about six months to complete in its entirety, but Meltzer s almanac took aloof a division of that, admitting his almanac attack has been about a decade in the making. I ve been aggravating to do it for nine years and the Appalachian Trail has been one of my admired trails anytime to run on, he told . Now, afterwards aggravating three times, I assuredly get the adventitious to say I m the baron of the AT. The antecedent almanac of 46 days, eight hours and seven account was captivated by Scott Jurek, a friend, training partner, and battling of Meltzer. Jurek ran his almanac from south to north, the adverse way to his counterpart. It was abundant to exhausted Scott Jurek s record, too, said Meltzer, and to accept him there at the end to run with me. It was absolutely an account and inspiration. Now it s my about-face to duke over the billy to addition else. A continued adventure of misery : Ultrarunners — a attenuate brand Afterwards one and a bisected months of four o clock starts in the morning in adjustment to run 50 miles, Meltzer s accomplishment was arduous and, in his own words, miserable.But the 48-year-old is by no agency abandoned in his adventure to backpack his anatomy over immense distances.An ultramarathon refers to any chase best than 42.195 km (26.219 miles), the breadth of a approved marathon. They can booty abode over a assumption of days, or artlessly absorb a distinct race, usually barometer amid 50 and 200 km.These contest are generally fabricated worse by backbreaking altitude aerial and underfoot. The Chase des Sables (MDS), for example, is a six-day, 251-km chase beyond the Sahara Desert. Not alone is the bendable beach awfully difficult to run on, but temperatures additionally generally beat 120Â°F (50Â°C). It s not for the fainthearted. Blisters can advance from the aboriginal atom of beach accepting in your shoes, and anxiety can cool from the heat. There are additionally added abiding problems: analysis has appropriate that active such acute distances may account accident to affection tissue.Read: How to survive a arid marathonThe Badwater Ultramarathon vies with the MDS for the appellation of the world s toughest footrace. The 135-mile advance in California s Death Valley alcove temperatures agnate to those in the Sahara. Contestants are generally apparent cutting abounding anatomy white apparel as aegis from UV light. It is estimated that 20-40% of runners on the alpha band abort to ability the finish.Then there s the Hardrock Hundred Mile Endurance Run in Colorado that covers 12,000 anxiety (3,700 m) of acclivity 13 times. The quickest time is a bald 22 hours 41 minutes. Meltzer has won this chase bristles times — added than any added man (Betsy Kalmeyer has the best changeable wins, additionally with five.) He s completed 89 ultramarathons in his career and has won 38 100-mile contest — again, added than any added man — accepting racked up six wins at the Wastach 100 and bristles at the Squaw Peak 50.But admitting his amazing stamina, Meltzer is still human, snacking on candy, and concluded anniversary day on the Trail with a algid beer. Almanac broken, he now intends to bolt up on beddy-bye and comedy some golf.But of advance he s got a apple almanac for that, too, accepting played the best holes anytime (230) in 12 hours. Maybe not so animal afterwards all.Meltzer began his almanac attack on August 3.