July 31, 2026
Listen
“You can’t recreate the feeling that Josh created for me as a coach in any synthetic way. It had to have been done the way that he did it.”
My guest for today’s episode is Danny Mackey, the head coach of the Brooks Beasts Track Club.
Almost two weeks before we recorded this, Josh Kerr ran 3:42.66 at the London Diamond League and took 47 hundredths of a second off Hicham El Guerrouj’s mile world record — a mark that had been on the books for 27 years. Danny is the guy who wrote the training for it. He’s been coaching Josh for eight years now and this year he’s also got Brandon Miller running 1:42.19 to win in London seventy minutes before Josh’s race. It was an epic day for the Brooks Beasts.
This one is a coach’s-eye reconstruction of how a world record actually gets built. We go back to the workouts in Albuquerque in 2024 when Danny first told Josh he thought the record was there. We get into the PowerPoint pitch to Brooks. Danny walks through how he writes training. We talk about the ninety-minute whiteboard meeting where a few grown men argued over tenths of a second for pacing and what Danny was thinking standing trackside with 350 meters to go. And finally, how this has transcended beyond the running community.
The best part comes toward the end when he reveals who this was all for. We last had him on in 2023 after the World Championships after Josh won gold, so it was only fitting that we got him back on after another momentous occasion.
Support The Sponsor
CORE
CORE: The CORE 2 Thermal Sensor takes the guessing out of heat training. It reads your core body temperature in real time - no thermometer, nothing invasive, and you can actually see what's happening inside your body while you train. Take 10% off the CORE 2 with code CITIUS10 at checkout when you visit corebodytemp.com.
VELOUS
VELOUS: VELOUS makes recovery footwear designed to help runners bounce back faster between sessions. Their sandals feature Tri-Motion™ Technology: a technical three-density foam system and contoured footbed engineered to cushion impact, support your arches, and help your toes stretch and relax on every step. They keep your feet and legs properly aligned after you put in all of those weekly miles. Run. Recover. Repeat. with VELOUS! Get 20% off your VELOUS order with code CITIUSMAG20 at checkout including FREE Shipping!
OLIPOP
OLIPOP: Raspberry Sherbet is a limited-edition, nostalgic new flavor that blends tangy raspberry with creamy vanilla. Every can of Olipop contains their Olismart blend, which includes ingredients designed to support digestive health and help feed your gut microbiome. If you haven't had tried Olipop yet, grab a can and see what the hype is all about! Head to DrinkOlipop.com and use code CITIUS25 at checkout to get 25% off your orders.
Chris Chavez
Chris Chavez launched CITIUS MAG in 2016 as a passion project while working full-time for Sports Illustrated. He covered the 2016 Olympics in Rio de Janeiro and grew his humble blog into a multi-pronged media company. He completed all six World Marathon Majors and on Feb. 15th, 2025 finally broke five minutes for the mile.
