If you’re a runner, the term lactate threshold is the key to unlocking new levels of speed and endurance. This physiological marker is the highest running intensity at which you can sustain a steady effort without an exponential buildup of lactate (often mistakenly called lactic acid) in your blood.
Think of it as the metabolic tipping point. When you run below your threshold, your body efficiently clears the lactate byproduct of energy production, and you can maintain your pace for a long time—like during a marathon. Cross that threshold, and lactate begins to accumulate faster than your leg muscles can process it, leading to the debilitating fatigue and the “heavy legs” feeling that forces you to slow down drastically. For most runners, the lactate threshold pace is the effort you can sustain for about 40 to 60 minutes—typically somewhere between your 10K and half-marathon race pace.
What is Lactate Threshold Training (LTT)?
Lactate threshold training (LTT) involves structured running workouts performed at or just below this crucial intensity. The goal is to nudge that tipping point faster, essentially training your body to be more efficient at a higher speed.
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Tempo Runs: Maintaining a consistent, “comfortably hard” pace (Zone 3/4) for an extended period, usually 20 to 40 minutes. This continuous effort teaches your body to manage lactate clearance over time.
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Threshold Intervals (Cruise Intervals): Shorter bursts of running (like 3-10 minutes) at threshold pace, followed by brief, active recovery periods (like 1-2 minutes of jogging). This allows you to accumulate more total time at a high intensity than you could in a single tempo run.
The Runner’s Benefits of Training Your Threshold
Training your lactate threshold offers several powerful benefits that directly translate to faster personal bests in races from the 5K to the marathon:
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Sustained Race Speed: The primary benefit is the ability to maintain a faster, race-level pace for a longer duration. By increasing your threshold, a half-marathon pace that once felt like a max effort may now feel comfortably hard and sustainable for the entire distance.
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Increased Running Efficiency: LTT improves your running muscles’ ability to clear and reuse lactate as a fuel source rather than letting it accumulate and cause fatigue. You become a more efficient runner at higher speeds.
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Better Pacing Strategies: Knowing your threshold heart rate or pace allows you to structure your workouts and race strategy with precision, ensuring you start and maintain the optimal pace without hitting the wall too early.
Incorporating LTT into your weekly routine—such as a weekly tempo run—is the most effective way to make significant gains in your running performance, allowing you to run faster for longer with less fatigue.
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This strategic and biomechanically sound methodology yields exceptional results across all disciplines: Coach Burger’s athletes include twelve State Champion hurdlers, a State Champion 4x800m Relay Team, and eleven All-State distance runners (XC, 1600m, 3200m) as well as recreational runners from the 5k to the marathon. Whether you are targeting a marathon, improving track speed, or seeking an injury-proof running career, choose the coach with the clinical expertise to build you into a true champion.
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