Do you want stress fractures? Because that's how you get stress fractures
this post was submitted on 21 Mar 2026
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That's just an accelerated C25K program. Harsh, but not impossible.
C25K compressed into 5 days is impossible if you're starting from the couch.
I think this is more about what happens when you get up to marathon lengths everyday.
Oh this would never work for someone that doesn't already have cardio conditioning.
I spoke too quickly, agreed. This would be madness, but it's still plausible madness, up to the limit of how much time you can spend per day running.
This can't continue indefinitely, you'll eventually be running non stop and simply die.
C25K is a month to do 5K. This is 5 days and you’re running 5K, 10 days 10K. 1 month 30k. After 1.5 months you’re running a marathon a day.
Harsh isn’t the word i’d use and if you aren’t an elite athlete you’re gonna stop after the first month if not before.
Yeah, ok, i spoke too quickly. It's not harsh, it's Darwinian.
Jesus Christ, I can barely walk out to check the mail without losing breath. I'm not building up to a 365km in 24 hours run!
Oh shit. I didn't even think about it before. But the world record marathon time is over 2 hours. At that world record pace, it would take over 17:18:00 to complete the final day of the year.
I think it's safe to say nobody's running that far in that time. It may not be physically possible to continue this for a full year.
That said, the goal doesn't seem to be to do a full year. It's to keep going until everyone else doing the same challenge gives up. Last year's 3rd place runner got to day 76. Today is day 80.
This sounds terrible for untrained joints and ligaments. Ruin your knees any%
Honestly it sounds terrible even for someone who is well-trained.
And I suspect anyone attempting it is going to be very well-trained.
Maybe 0.1km on day 1 and 0.2 on day 2 etc
What if it was just adding 1km per week and running twice per week?
Heck, you could do a run every day, but sticking at 1 km all week one, 2 km all week two, etc. That'd be a really tough challenge, but at least possible to complete the whole year for some ultrarunners. This challenge seems to be more about "how long can you go" than it is "can you do a whole year".