Garmin Stamina VO2 Threshold: Mapping the Fatigue Trigger
Garmin Stamina VO2 Threshold: Mapping the Fatigue Trigger In my ongoing pursuit of the “Physiology First” training approach at Onlinebikecoach.com, I have used the Garmin Stamina VO2 Threshold to map exactly where my internal stability ends and metabolic exhaustion begins. To build a more resilient aerobic engine, I need to know my limits. With my […]
Using Garmin Sleep and HRV Stress to Plan My Workouts: Today’s Real Example
When Garmin HRV Stress Hits 72: A Practical Morning Read on Sleep, Load, and What to Do Next Published: April 8, 2026 · Quick, physiology‑driven guidance for the morning after a high HRV Stress reading. I woke to an HRV Stress of 72 on my Garmin and a Garmin Sleep Score in the […]
Predicting the Redline: Using Garmin Sleep Scores to Master Ronnestad 30-15 Intervals
Physiology First: Using Garmin Sleep Scores to Predict Ronnestad 30-15 Success Part I: The Garmin Sleep Score Ronnestad Preflight We often treat training like a game of chance, but the reality is that your body provides a daily “weather report” if you know where to look. Before I even touched my bike this morning, I […]
Physiology First: Navigating a “Red Light” Morning with AlphaHRV
Physiology First: My Red Light Recovery Ride This morning was a masterclass in why I apply a Physiology First framework to every session, looking at the internal engine before I look at the wattage. Between a late meal and the devastating news about my friend Murray being struck by a motorist—suffering a serious […]
Mastering the Garmin Ecosystem: Using Sleep Scores and Alpha HRV for a Physiology First Approach
Garmin Guru: Why Your Ride Starts at 10 PM By Coach Wharton | Release Date: April 19, 2026 Garmin Guru insights reveal that in the League of Garmin, we don’t just track miles; we track the internal cost of those miles. To master your performance, you must look past surface-level metrics and understand how the […]
My Morning Ritual: The 3-Minute Test That Dictates My Entire Training Day
After over 20 years of chasing wattage and focusing on what my power meter says I can do, I’ve realized the real secret to long-term gains is knowing when to pull back. It’s about listening to the engine. Today, I’m breaking down one of the most underutilized tools in the Garmin ecosystem: the HRV Stress […]
Decoding the Hard-Start: How Ronnestad Intervals Impact Garmin Stamina & Training Effect
The “Hard-Start” Evolution: Pushing the Limits of the Rønnestad Protocol Testing the Ronnestad Hard-Start Intervals protocol this week provided a fascinating look at oxygen kinetics and internal load. Before this session, I attempted to link my VO2 Master to the phone for a full metabolic calibration. Despite several attempts, the mask simply wouldn’t handshake. Rather […]
Living in the Parabolas: My Deep Dive into the “VO2 State”
Living in the Parabolas: Decoding Metabolic Inertia and the Billat 90/90 In our last deep dive, we dissected the steady-state grind of 5×3 and 4×8 intervals. Those workouts are the bread and butter of threshold development. However, today we are stepping into the “red zone” to explore Veronique Billat’s 90/90 Metabolic Inertia. Using the combined […]
Physiological Threshold Vs. FTP: The Power Illusion
The Power Illusion: Resetting 20 Years of Training with Physiological Data After 20 years of cycling, I realized my FTP wasn’t telling the whole story of my actual physiological threshold. My identity as a cyclist was defined by a single, flickering number on a head unit: Watts. If you’ve spent any significant time in the […]
VO₂max Intervals: The Most Misunderstood Workout in Cycling—And How to Do Them “Right”
VO2Max State vs. Zone: What’s Happening Under the Hood https://youtube.com/shorts/gjB6seZEVec?feature=share I recently started using my VO₂Master again. In this session, I wanted to explore the VO2max state vs zone debate by looking at the actual physiological cost of high-intensity efforts. Earlier this week, I performed five separate 3-minute intervals at an intensity well above […]