Keeping this in view, what is the hardest part of a triathlon?
swim
Similarly, how hard is it to train for a triathlon? Depending on your current level of fitness, you'll likely need at least 8–12 weeks of consistent training before a super sprint (400-meter swim, 10K bike, 2.5K run) or sprint distance triathlon (750-meter swim, 20K bike, 5K run). Each week, plan to train 4–6 hours of total exercise time over five days.
In this way, is triathlon the hardest sport?
Ironman Triathlon - 26pts
The name itself suggests this should be one of the toughest sports in the world. The ironman scored tops in terms of endurance but missed out on the top 10 due to some low scores in other areas.
Which is harder marathon or a triathlon?
There's an age-old debate about which is more difficult – running a marathon or running in a triathlon. That's primarily because when you compete in a marathon, you're starting with a fresh pair of legs. During a triathlon, on the other hand, you're going into your run after competing in the bike portion of the race.