If you’ve ever hit that moment in a workout where your legs turn to cement, your lungs are on fire, and every fiber of your being is screaming “STOP,” you’ve bumped up against your lactate threshold. But what exactly is it, and more importantly, why should you care about improving it?
Understanding your lactate threshold might be the missing piece in your fitness puzzle—the difference between grinding through workouts and flowing through them with power and confidence. Let’s break down this crucial fitness concept and discover how it can transform your training.
What Is Lactate Threshold?
Lactate threshold is the highest sustainable intensity you can maintain before lactate (a byproduct of intense exercise) accumulates faster than your body can clear it. Think of it as the tipping point between aerobic energy production—where your body efficiently uses oxygen to fuel movement—and anaerobic energy production, where you’re working so hard that you can’t keep up with the metabolic demands.
When you’re below your lactate threshold, you’re balancing energy production with fatigue resistance. Your body is clearing lactate as quickly as it’s being produced, and you can maintain that pace for an extended period. Push past that threshold, however, and lactate begins to accumulate, fatigue sets in rapidly, and you’re forced to slow down or stop.
The Sports Car Analogy
Picture a sports car cruising down the highway. If the car isn’t built well, the engine overheats when you push it too hard. But if the cooling system is upgraded, it can maintain high speeds without burning out.
That’s lactate threshold in a nutshell—your body’s ability to keep going hard without hitting a breaking point. The better your lactate threshold, the longer you can sustain high speeds before fatigue sets in.
A beginner is like a car that starts overheating when pushed past 60 mph. Their lactate threshold is relatively low, meaning even moderate intensity efforts feel extremely challenging and can’t be sustained for long.
A trained athlete, on the other hand, is like a performance race car that can hold 120 mph without breaking down. They’ve built up their body’s ability to buffer and clear lactate, allowing them to work at higher intensities for longer periods without hitting that wall.
Why Lactate Threshold Matters: 5 Game-Changing Benefits
1. Extended High-Performance Capacity
A strong lactate threshold means you can hold a faster pace longer before fatigue sets in. Whether you’re running, rowing, or pushing through a grueling MetCon, improving your lactate threshold extends the time you can operate at high intensity. This translates to better workout performance, faster race times, and the ability to push harder when it counts.
2. Superior Metabolic Efficiency
Here’s where it gets really interesting: improving your lactate threshold actually teaches your muscles to use lactate as fuel. Rather than viewing lactate as a waste product that causes fatigue, your body learns to recycle it back into usable energy. This metabolic efficiency means you’re getting more mileage out of every effort, making you a more economical athlete overall.
3. Enhanced Cardiovascular Health
Training your lactate threshold strengthens your entire cardiovascular system. Your heart becomes more efficient at pumping blood, your muscles develop more capillaries to deliver oxygen, and your mitochondria (the powerhouses of your cells) multiply and become more effective. These adaptations don’t just make you better at CrossFit—they improve your overall health and longevity.
4. Increased Fatigue Resistance
Whether you’re tackling a challenging WOD, playing with your kids, or navigating the physical demands of daily life, a higher lactate threshold means you can do more before fatigue sets in. You’ll recover faster between efforts, maintain better form under fatigue, and have more energy left in the tank when you need it.
5. Mental Toughness and Confidence
There’s a psychological benefit to improving your lactate threshold that shouldn’t be overlooked. When you know you can sustain a hard pace without breaking, you approach workouts with more confidence. That mental edge—knowing your engine won’t overheat—allows you to push harder and achieve more than you thought possible.
How We Train Lactate Threshold at CrossFit Lincoln
Improving your lactate threshold requires specific training strategies. Here’s how we incorporate this into your programming:
Sustained Threshold Intervals: These are efforts lasting 3-10 minutes at 80-90% of your max heart rate (or roughly 85-90% of your best 5K pace), with short rest periods between intervals. The goal is to work right at or slightly below your threshold, teaching your body to sustain that intensity.
Tempo Workouts: Continuous efforts at a “comfortably hard” pace for 20-40 minutes. You should be able to speak in short sentences but not carry on a full conversation. This zone is perfect for building lactate threshold capacity.
Lactate Clearance Drills: These involve alternating between short bursts above your threshold and periods just below it. This trains your body to clear lactate more efficiently while also building tolerance to working in that uncomfortable zone.
See It in Action
You’ll experience lactate threshold training this Thursday with our burpee and wall ball workout. Rather than sprinting through the first round and crashing, focus on finding a sustainable pace that you can maintain across all rounds. That “comfortably hard” effort where you’re working but not completely redlining? That’s your lactate threshold at work.
Embrace the sustained effort. Your future self—the one who can hold higher speeds longer without breaking down—will thank you.