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Newsletter #925: Saturday, 25th September 2026


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Hey runners, in today's newsletter, Berlin is set up for a world record attempt, and Tigst Assefa is going it alone.

With defending champion Rosemary Wanjiru aiming for 2:15 and Alisa Vainio for 2:20, Assefa will have only her pacemakers for company at record pace on Sunday, with six-figures on the line if she gets it. The men's race is being paced toward Kipchoge's course record too, even though the fastest man left in the field has a best of 2:03:00.

Elsewhere, Vinny Mauri has signed with ASICS and will line up in Chicago as a professional, and Joe McConaughy took the John Muir Trail record off François D'Haene, which stood for nearly 10 years.

And as always, we round things out with the practical stuff: everything you need to know about strength training, 10 tips for running in the dark, and a full guide to threshold workouts.

Jessy Carveth

Senior News Editor, Marathon Handbook


​Berlin Marathon 2026 Preview​

In this bonus episode of The Running Story, Michael checks in with Jessy who is on the ground in Berlin ahead of the 52nd BMW Berlin Marathon. Jessy reports from the expo inside the old Tempelhof Airport, gives her verdict on the 2026 Adidas Berlin Marathon jacket and merch, and goes hands-on with the Adidas Adizero Adios Pro Evo 3 (the sub-2 shoe), the new hot-pink Adios Pro 5, and Mizuno's lace-less 96-gram super shoe, which is now the lightest racing shoe in the world.


​Vinny Mauri Signs With ASICS Before the Chicago Marathon​

The Ohio runner ran 2:05:54 in his first marathon while coaching himself and working in a running store, and he will line up in Chicago on Oct. 11 as a professional.


​Kenenisa Bekele Pulls Out of the Berlin Marathon a Week After Joining the Field​

The 44-year-old injured his left Achilles tendon late in his buildup, organizers said Thursday. His last completed marathon was at the Paris Olympics two years ago.


​Italy’s Luca Del Pero and Poland’s Patrycja Stanek Win Skyrunning World Titles on La Gomera​

Del Pero came from sixth to win the 29K SKY race and the combined title two days after taking bronze in the vertical. Stanek won by 36 seconds in her first senior world championship.


​Berlin Will Pace Its Men’s Race for Eliud Kipchoge’s Course Record​

Race director Mark Milde wants the lead group heading toward 2:01 on Sunday, even though the fastest man left in the field has a best of 2:03:00.


​How Much Prize Money Could Tigst Assefa Win For Breaking The World Record​

Winning Sunday's Berlin Marathon in a world record would earn the Ethiopian €110,000 from the organizers, for a time almost two minutes under her personal best.


​Strength Training For Runners: Here’s Exactly What You Need To Know And Do​

Why lifting is a runner’s secret weapon for speed, endurance, and injury prevention.


​10 Safety Tips For Running In The Dark​

Stay safe with our running coach's top tips.


​Threshold Runs: Workouts, Pace + The LT1-vs-LT2 Truth​

Ready to take your running to the next level? Learn exactly how threshold training works—and get a set of proven, time-based workouts you can add straight into your weekly plan to boost speed and stamina.


​U.S. Sprinter Sam Blaskowski Leaves Star Athletics Over Racist Posts From High School​

The 23-year-old, who ran 9.89 for 100m in May, apologized Wednesday as Poland's athletics federation prepares to ask the country's president to fast-track his citizenship.


​Joe McConaughy Takes the John Muir Trail Record From François D’Haene​

The 33-year-old from Seattle ran the 223-mile trail in 2 days and 16 hours, cutting 3 hours and 26 minutes from a record that had stood since 2017.


​A 78-Year-Old Berliner Will Run His 50th Berlin Marathon on Sunday​

Wilfried Köhnke sat out the first race in 1974 because the press had him convinced that only specialists ran marathons. He has finished 49 of the 50 editions held since.


​Tigst Assefa Will Be on Her Own When She Chases the World Record in Berlin​

Defending champion Rosemary Wanjiru is aiming for 2:15:00 and European champion Alisa Vainio for 2:20:00, which leaves the Ethiopian with only her pacemakers for company at record pace on Sunday.


​Mizuno Unveils 96 Gram Racing Shoe, Lighter Than Adidas’ World Record Shoe​

The carbon-plated racer goes on sale Dec. 4 for ¥88,000 ($554) in Japan and weighs about 96 grams in a men's U.S. 9, one gram off Adidas' figure for the Adizero Adios Pro Evo 3.


​Runners Swim Through Flooded Half Marathon​

Michael Doyle and Jessy Carveth break down this week's biggest stories in the running world. From a half marathon that turned into a flash-flood disaster, to a new sub-2-hour marathon attempt announced for Valencia, to a shoe-logo lawsuit shaking up the industry.


Quick Sprints:

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