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Posted On: October 20th 2026, 11:40 pm
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LACTATE: ONE OF THE MOST MISUNDERSTOOD TOOLS IN ENDURANCE PERFORMANCE. 🩸📈
Lactate isn’t your enemy. It’s a valuable fuel source, a key metabolic intermediate, and one of the most useful tools we have for understanding endurance performance.
Your body produces lactate when it breaks down glucose for energy. Lactate can be transported between tissues and used as fuel by muscles, the heart, and other organs. In fact, it’s one of the body’s preferred oxidative fuels under the right conditions.
So, how do we use it to improve performance?
Meet LT1 & LT2.
🔹 LT1 — First Lactate Threshold: The first sustained rise in blood lactate above baseline. It helps us understand your aerobic capacity, sustainable endurance intensity, and how efficiently you can produce and utilize energy.
🔹 LT2 — Second Lactate Threshold: The higher-intensity transition where lactate begins accumulating more rapidly. It helps us understand your ability to sustain harder efforts and identify key training intensities for race performance.
🚨 Here’s where athletes and coaches get it wrong:
There is NO universal lactate value that defines LT1 or LT2. They aren’t automatically 2.0 or 4.0 mmol/L.
They are identified by analyzing your individual lactate response and finding the relevant inflection points in your data. Simply seeing a number on a lactate meter and declaring your thresholds can lead to inaccurate training zones and misguided programming.
This is why a FULL lactate analysis matters. The protocol, your individual response, and the shape of your lactate curve all matter when interpreting your thresholds.
Lactate testing is a powerful tool for performance prediction, training prescription, and tracking physiological adaptations over time—but only when the data is collected and interpreted correctly.
🩸 I offer lactate testing and individualized data interpretation to help athletes understand their physiology, dial in their training zones, and turn data into better race-day performance.
Stop guessing your zones. Start understanding your physiology.
Want to know what your lactate curve is telling you? Let’s talk.
Lactate isn’t your enemy. It’s a valuable fuel source, a key metabolic intermediate, and one of the most useful tools we have for understanding endurance performance.
Your body produces lactate when it breaks down glucose for energy. Lactate can be transported between tissues and used as fuel by muscles, the heart, and other organs. In fact, it’s one of the body’s preferred oxidative fuels under the right conditions.
So, how do we use it to improve performance?
Meet LT1 & LT2.
🔹 LT1 — First Lactate Threshold: The first sustained rise in blood lactate above baseline. It helps us understand your aerobic capacity, sustainable endurance intensity, and how efficiently you can produce and utilize energy.
🔹 LT2 — Second Lactate Threshold: The higher-intensity transition where lactate begins accumulating more rapidly. It helps us understand your ability to sustain harder efforts and identify key training intensities for race performance.
🚨 Here’s where athletes and coaches get it wrong:
There is NO universal lactate value that defines LT1 or LT2. They aren’t automatically 2.0 or 4.0 mmol/L.
They are identified by analyzing your individual lactate response and finding the relevant inflection points in your data. Simply seeing a number on a lactate meter and declaring your thresholds can lead to inaccurate training zones and misguided programming.
This is why a FULL lactate analysis matters. The protocol, your individual response, and the shape of your lactate curve all matter when interpreting your thresholds.
Lactate testing is a powerful tool for performance prediction, training prescription, and tracking physiological adaptations over time—but only when the data is collected and interpreted correctly.
🩸 I offer lactate testing and individualized data interpretation to help athletes understand their physiology, dial in their training zones, and turn data into better race-day performance.
Stop guessing your zones. Start understanding your physiology.
Want to know what your lactate curve is telling you? Let’s talk.
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