The Strength Running Podcast

Fueling 2.0: Training with a Continuous Glucose Monitor with Olympic Coach Hunter Allen

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Jun 19, 2025
Hunter Allen, a USA Cycling Level I coach and co-founder of TrainingPeaks, discusses the revolutionary impact of Continuous Glucose Monitors (CGMs) on endurance training. He highlights how CGMs provide real-time glucose data essential for optimal fueling. Listeners learn how to calibrate these devices, find their personal glucose ranges, and strategize nutrition to prevent crashes and spikes. Allen also addresses who might benefit from CGMs and shares insights from his new book, revealing the crucial relationship between glucose management and athletic performance.
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INSIGHT

How CGMs Measure Glucose

  • A continuous glucose monitor measures glucose in the interstitial space, not directly in blood.
  • It updates glucose levels continuously, providing real-time insights on body glucose fluctuations.
INSIGHT

CGMs Shift From Diabetics to Athletes

  • CGMs were originally designed for diabetics to regulate insulin and glucose.
  • Endurance athletes now use CGMs to optimize fueling and performance strategies.
ADVICE

Maintain Optimal Glucose During Training

  • Use a CGM to keep glucose in an optimal training range, usually 120 to 160 mg/dL.
  • Fuel before and during workouts to avoid glucose drops that cause fatigue or hypoglycemic symptoms.
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