What Is Threshold Training? And Why Is Everyone Talking About It?

If you’ve spent any time around running, HYROX, endurance training or performance-based fitness recently, you’ve probably heard the term “threshold training”.

But what actually is it?

Threshold training is one of the most effective ways to improve your endurance, speed and overall fitness without simply doing endless long-distance cardio.

Whether you’re training for HYROX, improving your running, building an engine for sport or just wanting to become fitter overall, threshold training can make a huge difference to your performance.

What is threshold training?

Threshold training focuses on working at, or just below your lactate threshold.

Your lactate threshold is essentially the point where your body starts producing more lactate than it can clear efficiently.

In simpler terms:
It’s the pace or intensity where exercise starts to feel seriously challenging, but still sustainable for a period of time.

It’s often described as:

• “Comfortably hard”
• Hard work, but controlled
• An intensity you can maintain whilst still working consistently

You’re pushing hard, but not sprinting.

Why threshold training matters

Threshold training teaches your body to work harder for longer before fatigue kicks in.

Over time, this improves:

• Cardiovascular fitness
• Endurance
• Running efficiency
• Work capacity
• Recovery
• Mental resilience

Essentially, it helps you sustain faster paces and higher intensities without completely blowing up.

That’s why threshold work is hugely important for:

• HYROX athletes
• Runners
• Cyclists
• Team sports athletes
• Functional fitness athletes
• Anyone wanting to improve conditioning

What does threshold training feel like?

A good way to think about threshold training is this:

You should feel:

• Breathing heavily
• Focused
• Working hard
• Slightly uncomfortable

But you should NOT feel:

• Out of control
• Maxed out
• Completely breathless
• Unable to continue

You’re sitting right on that edge between sustainable and unsustainable effort.

Examples of threshold training

Threshold sessions can take many forms depending on your goal.

Some examples include:

• Sustained running efforts
• Interval training
• Rowing intervals
• SkiErg efforts
• Assault bike conditioning
• Mixed HYROX-style workouts

Example running session:

• 3 x 8 minutes at threshold pace
• 2 minutes easy recovery between efforts

Example conditioning session:

• 5 rounds:
  
  • 500m run
  • 500m SkiErg
  • Rest 90 seconds

The goal is controlled intensity, not all-out effort.

Threshold training improves HYROX performance massively

Threshold training is especially important for HYROX athletes.

Why?

Because HYROX requires you to repeatedly recover whilst still working at high intensity.

You need to:

• Run efficiently under fatigue
• Recover quickly between stations
• Sustain effort for long periods
• Control your breathing
• Avoid redlining too early

Threshold work helps train all of those things.

It improves your ability to stay composed and perform well even when fatigue builds.

The biggest mistake people make

One of the most common mistakes in conditioning training is going too hard all the time.

People often train:

• Too fast on easy days
• Too hard in intervals
• Completely maxed out every session

This usually leads to:

• Poor recovery
• Burnout
• Plateaued progress
• Increased injury risk

Threshold training sits in that sweet spot where you can train hard enough to improve performance whilst still recovering properly.

It’s not just for elite athletes

Threshold training sounds technical, but it’s suitable for all fitness levels.

Beginners can use threshold work to:

• Build confidence
• Improve cardio fitness
• Learn pacing
• Increase endurance safely

More advanced athletes can use it to:

• Improve race performance
• Build engine
• Increase work capacity
• Push performance further

Like all good training, it’s scalable to the individual.

Why we include threshold work in our training

At our gym, threshold-style training is a huge part of improving overall fitness and performance.

It helps members:

• Build endurance
• Improve fitness efficiently
• Increase confidence
• Perform better in HYROX and conditioning workouts
• Train smarter, not just harder

Threshold training isn’t about surviving a session.
It’s about learning how to sustain quality effort consistently.

And that’s where real fitness improvements happen.

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