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IRONMAN Switzerland Thun stellt einen langen, welligen Tag an den Thunersee: 3,8 Kilometer Schwimmen im See, 180 Kilometer über das grüne Hügelland des Berner Oberlands und ein flacher Marathon am Seeufer. Einen einzelnen Pass gibt es nicht, doch gut 2.100 Höhenmeter auf dem Rad summieren sich: Die Vorbereitung zielt auf Dauerleistung und cleveres Krafteinteilen über zehn Stunden und mehr.","IRONMAN Switzerland Thun sets up a long, rolling day at Lake Thun: a 3.8-kilometre swim in the lake, 180 kilometres across the green hill country of the Bernese Oberland and a flat marathon along the shore. There is no single mountain pass, yet a good 2,100 metres of climbing add up on the bike; preparation is about endurance and smart energy management across ten hours and more.",{"de":200,"en":201},"Geschwommen wird über 3,8 Kilometer im Thunersee, ehe die 180 Kilometer lange Radrunde ins grüne Hinterland führt. Das Profil ist rollend statt hochalpin: Fast die Hälfte der Strecke ist flach, doch die Meter zwischen den Wellen wollen ständig neu getreten werden.\n\nDie nennenswerten Anstiege liegen im mittleren Abschnitt der Radrunde, etwa zwischen Kilometer 42 und 72: kurze Rampen von einem bis zwei Kilometern mit drei bis knapp sieben Prozent, keine davon lang, in Summe aber gut 2.100 Höhenmeter über den ganzen Radteil. Ein einzelner Königsanstieg fehlt; die Schwierigkeit steckt in der Wiederholung.\n\nDer abschließende Marathon verläuft flach am Ufer des Thunersees und wird in mehreren Runden gelaufen. Nach dem welligen Rad ist das ein Rhythmusabschnitt: Die Höhenmeter sind gemacht, jetzt zählt, was von den Beinen übrig ist.","The swim covers 3.8 kilometres in Lake Thun before the 180-kilometre bike loop heads into the green hinterland. The profile is rolling rather than high-alpine: almost half the course is flat, yet the metres between the rises constantly ask to be pedalled anew.\n\nThe notable climbs sit in the middle third of the bike loop, roughly between kilometre 42 and 72: short ramps of one to two kilometres at three to nearly seven percent, none of them long, but together making up the bulk of the 2,100 metres over the whole ride. There is no single marquee ascent; the difficulty lies in the repetition.\n\nThe closing marathon runs flat along the shore of Lake Thun and is covered in several laps. After the rolling bike it is a rhythm section; the climbing is done, and now what is left in the legs decides.",{"de":203,"en":204},"Auf einem rollenden 180er entscheidet die Gleichmäßigkeit: Die kurzen Anstiege verführen dazu, jeweils kräftig anzutreten, doch über hunderte solcher Wellen summieren sich diese Körner zu einem teuren Konto. Wer die Rampen im gleichmäßigen Wattbereich nimmt und auf den flachen Passagen nicht überzieht, kommt mit intakten Beinen in den Wechsel.\n\nRennentscheidend ist der mittlere und hintere Radabschnitt mit seinen gehäuften Anstiegen sowie der Übergang in den flachen Marathon. Der häufigste Fehler ist, das wellige Rad wie ein Zeitfahren zu behandeln und die Reserven vor dem Laufen zu verheizen.\n\nDer Marathon selbst ist flach und in Runden gegliedert: Hier zahlt sich die Zurückhaltung vom Rad aus. Ein konstantes, eher konservatives Anfangstempo auf der ersten Runde schützt vor dem klassischen Einbruch im letzten Drittel.","On a rolling 180-kilometre ride, evenness decides everything: the short climbs tempt you to press hard each time, but across hundreds of such rises those matches add up to an expensive account. Take the ramps at steady power and avoid over-riding the flat sections, and you reach transition with your legs intact.\n\nThe race is shaped by the middle and back of the bike, with its clustered climbs, and by the switch into the flat marathon. The most common error is treating the rolling bike like a time trial and burning the reserves you need to run.\n\nThe marathon itself is flat and split into laps; here the restraint shown on the bike pays off. A steady, rather conservative pace on the first lap guards against the classic collapse in the final third.",{"de":206,"en":207},"Ein Age-Group-Finish über die Volldistanz dauert je nach Leistungsstand rund neun bis vierzehn Stunden. Die Anforderung ist damit vor allem eine der aeroben Dauerleistung: Es gilt, über einen sehr langen Zeitraum eine gleichmäßige, gut fahr- und laufbare Intensität zu halten, statt einzelne Spitzen zu setzen.\n\nDer Belastungscharakter ist trotz der 2.100 Höhenmeter überwiegend gleichmäßig-aerob. Weil die Anstiege kurz und moderat sind, kommt es weniger auf explosive Kletterkraft an als auf die Fähigkeit, hunderte kleine Wellen ohne Wattspitzen abzuarbeiten.\n\nRennentscheidend sind der hintere, wellige Teil der Radrunde und der Marathon auf müden Beinen. Beide verlangen, dass Kraft und Kohlenhydratspeicher bis zum Schluss reichen, nicht Antrittsvermögen, sondern Haltbarkeit.\n\nIm Training gehören deshalb lange Radeinheiten mit vielen kurzen Anstiegen, Koppelläufe nach dem Rad und ein eingeübtes Verpflegungskonzept in den Mittelpunkt. Ein flacher, in Runden gelaufener Marathon belohnt zusätzlich das Training gleichmäßiger Lauftempi über lange Distanzen.","An age-group finish over the full distance takes roughly nine to fourteen hours depending on ability. The demand is therefore above all one of aerobic endurance: holding a steady, sustainable ride-and-run intensity over a very long stretch rather than setting isolated peaks.\n\nDespite the 2,100 metres of climbing, the character stays predominantly steady and aerobic. Because the climbs are short and moderate, it depends less on explosive climbing power than on the ability to work through hundreds of small rises without spiking the wattage.\n\nThe race is decided by the rolling back half of the bike and by the marathon on tired legs. Both require strength and carbohydrate stores to last to the end, durability rather than a punchy kick.\n\nTraining therefore centres on long rides with many short climbs, brick runs off the bike and a rehearsed fuelling plan. A flat, lapped marathon additionally rewards practising steady running paces over long distances.",[209],{"eventName":6,"eventDate":9,"eventHomepageUrl":11},[211,220,229,235,243,251],{"slug":212,"eventName":213,"proseName":214,"city":216,"country":8,"eventType":13,"eventDate":217,"distanceInMeters":218,"elevationGainInMeters":219,"classification":24},"valais-triathlon-festival","Valais Triathlon Festival 2026",{"de":215,"en":215},"Valais Triathlon Festival","Sion","2026-08-15T00:00:00.000Z",225995,1129,{"slug":221,"eventName":222,"proseName":223,"city":224,"country":8,"eventType":13,"eventDate":225,"distanceInMeters":226,"elevationGainInMeters":227,"classification":228},"swissman-xtreme-triathlon","SWISSMAN Xtreme Triathlon",{"de":222,"en":222},"Ascona","2026-06-20T00:00:00.000Z",228319,6900,"MOUNTAINOUS",{"slug":230,"eventName":231,"proseName":232,"city":7,"country":8,"eventType":13,"eventDate":217,"distanceInMeters":233,"elevationGainInMeters":234,"classification":228},"inferno-triathlon","INFERNO Triathlon",{"de":231,"en":231},155000,5500,{"slug":236,"eventName":237,"proseName":238,"city":239,"country":8,"eventType":13,"eventDate":240,"distanceInMeters":241,"elevationGainInMeters":242,"classification":24},"ironman-70-3-switzerland","IRONMAN 70.3 Switzerland",{"de":237,"en":237},"Rapperswil-Jona","2026-06-07T00:00:00.000Z",113100,1117,{"slug":244,"eventName":245,"proseName":246,"city":247,"country":8,"eventType":13,"eventDate":248,"distanceInMeters":249,"elevationGainInMeters":250,"classification":24},"uster-triathlon","Uster Triathlon",{"de":245,"en":245},"Uster","2026-08-23T00:00:00.000Z",112900,1144,{"slug":252,"eventName":253,"proseName":254,"city":255,"country":256,"eventType":13,"eventDate":257,"distanceInMeters":258,"elevationGainInMeters":259,"classification":24},"challenge-roth","DATEV Challenge Roth",{"de":253,"en":253},"Roth","Germany","2027-07-04T00:00:00.000Z",226000,1628,1787239537609]