Ultra Endurant · Tuesdays, Fridays, Sundays
The newsletter forultra runners
One subject a week, from three perspectives. First, what the science says, then my take as an experienced coach, and finally readers questions.
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UESCA Certified
The Ultra Endurant newsletter is written by Jonathan Fors, a UESCA certified ultra running coach.
Three deep dives, from three angles.
Knees one week, heat the next. Tuesday explains it, Friday argues with it, Sunday answers what you asked about it.
- Tuesday
The science
One idea from the research, explained properly — the mechanism, not just the takeaway. Grounded in the coaching course material rather than whatever crossed my feed that week.
- Friday
My take
My take on the subject as an experienced coach. Marked as opinion, so you always know which half you're reading.
- Sunday
Your questions
A real question from a subscriber, answered in full. Reply to any edition and yours goes in the pile.
Written by a coach. Not by a feed.
Tuesday's science comes out of the coaching UESCA course material I certified on, with the studies behind it named. Friday is my own opinion and it says so — you shouldn't have to guess which of the two you're reading. Every term gets explained the first time it turns up, because a newsletter you have to look things up to follow isn't worth the three minutes.
Who's writing it
Jonathan Fors
UESCA-certified · Ultra-endurance running coach
I coach runners training for a first ultra, or a next hundred-miler — most of them with jobs, families and not enough hours in the week. In August 2026 I ran the coastline of Portugal, 744 km in 10 days, for men's mental health. Two years earlier the same route stopped me at 480 km, which is the more useful half of the experience — and a fair amount of what ends up in here.
- Free
Free forever
No paid tier, no course at the end of it, nothing held back for people who pay. The newsletter is the whole thing.
- 03
Three editions per week
Tuesday, Friday and Sunday. Each one is a few minutes on a phone — short enough to actually read, long enough to be worth reading.
- 01
One subject a week
All three editions take the same theme from a different side, so a week adds up to something instead of arriving as three unrelated tips.
Start on Tuesday.
If it turns out not to be for you, the unsubscribe link is at the foot of every edition and I won't hold it against you.
Your details go to beehiiv, who send the emails. Privacy policy.