Breaking the Plateau: How Step-Up Intervals Unlock Deep Vo2 Kinetics

Scatter plot showing RR-a1 ratio vs heart rate correlation model and VT1 VT2 threshold modeling during step-up VO2 max intervals

Breaking the Plateau: How Step-Up VO2 Max Intervals Unlock Deep Oxygen Kinetics By Richard Wharton | OnlineBikeCoach.com   Executing step-up VO2 max intervals is one of the most effective strategies I use to drive time near maximal oxygen uptake without causing premature neuromuscular exhaustion. Standard flat-power VO2 max sets often result in either a slow […]

When “Easy” Power Isn’t Easy: A VO2 Master Data Deep Dive

A multi-axis performance chart tracking cycling power in watts, traditional heart rate in bpm, and a step-down Garmin Performance Condition metric showing clear cardiovascular drift over 75 minutes.

Analyzing VO2 Master data reveals a stark reality check from my ride this Friday morning. I expected a straightforward, low-intensity recovery base day. Instead, my body gave me a loud warning. Even though I intentionally kept my external intensity low, the internal cost of the ride was exceptionally high. This ride is a textbook example […]

Real-Time Decompensation: Decoupling and the Anatomy of My Failed Workout

Garmin Connect mobile app landscape screenshot displaying the Performance Condition and Heart Rate Zones chart overlay for a cycling interval workout.

Every endurance athlete knows the feeling of hitting a wall, but few can see it coming down the track with mathematical precision, which is why monitoring your Garmin Performance Condition is so vital during hard blocks. Yesterday, I set out to complete a critical high-intensity maintenance block: 7×3-minute VO2max intervals targeting north of 270 watts. […]

The Autonomic Pivot: When Less Training Volume Equals Deeper Recovery

Garmin Connect mobile app screenshot displaying a 4-week timeline of high sleep scores alongside a sloping downward trend in overnight resting heart rate.

The Autonomic Pivot: When Less Training Volume Equals Deeper Recovery By Coach Richard Wharton, OBC | Published: May 25, 2026 Tracking my **Garmin HRV Stress** over the last few months has revealed a fascinating tug-of-war within my autonomic nervous system. Specifically, it shows exactly how shifting training workloads register on the body. Looking back at […]

Cracking the Code: My Physiology First Tabata VO2 Max Deep Dive

A comparison graph showing cumulative average power decay over three Tabata sets, highlighting higher initial intensity in Set 1 and more stabilized power in Sets 2 and 3.

Cracking the Code: My Physiology and the Tabata Triple Threat Preface: The Metabolic Green Light vs. The CNS Red Light Before I even turned a pedal, the data was already telling a nuanced story. I woke up with a solid 83 sleep score and a body battery that recharged to 85—clear signals that my recovery […]

Stamina, Speed, Strength, and Skill – 4 Spokes With a Hub called “Consistency”.

A conceptual bicycle wheel graphic showcasing the four pillars of Online Bike Coaching. A tri-spoke carbon fiber wheel features keywords printed on its blades: STAMINA, SPEED, and SKILL. At the central hub centerpiece, the word CONSISTENCY is printed twice. The full Online Bike Coach logo, as seen in image_20.png, is visible in the background.

Cycling Stamina and Strength: The S4 Framework Building elite cycling stamina and strength is the foundation of the S4 performance framework used by high-performance athletes.In the world of professional cycling, we often get distracted by the latest gear or chasing the highest wattage. But at its core, your performance is a wheel supported by four […]

The Garmin Daily Double Dip: A Stamina and Potential Deep Dive

A zoomed-in data chart overlaying Garmin Actual Stamina depletion with Muscle Oxygen (SmO2) percentage during a high-intensity cycling interval workout.

The Garmin Daily Double Dip: A Stamina and Potential Deep Dive Coach Wharton – May 7, 2026 Understanding Garmin Stamina metrics like Actual Stamina and Stamina Potential has fundamentally changed the way we analyze real-time capacity and athletic recovery. While Potential represents your total “fuel tank” for the entire ride, Actual Stamina reflects what you […]

Why Your “Free” Garmin Metrics are More Accurate Than You Realize

Garmin Edge post-ride analysis showing Aerobic Training Effect of 5.0 and 72-hour recovery time.

Why Your “Free” Garmin Metrics are More Accurate Than You Realize When athletes ask about Garmin VO2 Max accuracy, they are usually skeptical about whether a consumer wearable can truly measure the high-octane reality of a 15-15 interval set. On paper, today’s session was a classic builder—two sets of 15-minute micro-intervals—but as a physiology-first coach, […]

98% Charged: The +61 Garmin Body Battery Bounce Back

Garmin Body Battery 28-day chart showing a peak of 98.

The Great Recharge: How I Pushed My Garmin Body Battery Back to 98 By Richard Wharton Achieving a massive Garmin Body Battery recharge is the ultimate goal after the physical toll of outdoor labor drains you to zero. Following up on my last post, I wanted to share the physiological “bounce back” results that took […]