Start / 1 % Better – Hidden Stories in Sport / Questioning limiters in endurance dr andrew koutnik

Questioning Limiters in Endurance - Dr Andrew Koutnik

91 min • 21 februari 2025

Another week another bunch of running records which we cover. After this we chat a bit about Tarawera Ultramarathon results and the Tyreek Hill vs Noah Lyles showdown before touching on a new form of doping - Mitochondrial Transplants.

We then get to an interview with Dr Andrew Koutnik a researcher studying the influence of nutrition and metabolism on health, disease, and performance about a paper he was an author on; “Carbohydrate Ingestion Eliminates Hypoglycemia & Improves Endurance Exercise Performance in Triathletes Adapted to Very Low & High Carbohydrate Isocaloric Diets”

(00:00) Introduction

(07:17) David’s Heat Training

(10:15) Xylon Turns a Corner

(14:00) Community Shoutouts

(17:12) Indoor Track Records

(21:30) New Half Marathon WR

(26:16) Tarawera Results

(29:50) Noah Lyles vs Tyreek Hill

(32:40) Mitochondrial Transplants

(40:30) Interview Starts

(42:40) Importance of Science Communication

(46:02) What Was Done in the Study?

(48:20) Timeline of Adaptation to Low Carb Diets

(53:05) Study Design

(61:20) Findings of the Study

(63:00) Study Population and Applicability

(74:00) Metabolically Unhealthy Athletes

(78:29) Outro and Review

(84:40) Doctor’s Office

(89:20) What We’ll Be Watching

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Links to Andrew:

Instagram: @andrewkoutnikphd

X: @AKoutnik

Article on Mitochondrial Transplantation as Doping

https://www.telegraph.co.uk/news/2025/02/14/new-doping-trick-why-scientists-fear-athletes-already-using/

David’s Article on Mitochondrial Transplants

https://open.substack.com/pub/healthperformancenexus/p/mitochondrial-transplantation

Article Discussed with Andrew

https://journals.physiology.org/doi/full/10.1152/ajpcell.00583.2024

Article Andrew Mentioned on Runners

https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2023.1150265/full