Brick Sessions Explained: Why Every Beginner Triathlete Needs Them

If you're new to triathlon, you've probably heard the term "brick session" and wondered what it actually means.

At first glance, it sounds like a strange name for a workout.

But ask any experienced triathlete and they'll tell you that brick sessions are one of the most valuable training tools available.

In fact, for beginners, they can be the difference between a smooth race experience and feeling like you've forgotten how to run entirely.

At Frederick Webb Triathlon, brick sessions form an important part of many athletes' training plans because they help prepare the body and mind for one of the most unique challenges in triathlon:

Running immediately after cycling.

Let's explore what brick sessions are, why they matter, and how beginners can use them effectively.

What Is a Brick Session?

A brick session is simply a workout that combines two disciplines back-to-back.

The most common brick workout is:

Bike → Run

For example:

• 60-minute bike ride

• Immediately followed by a 15-minute run

The transition between disciplines should be quick, similar to what happens on race day.

The purpose isn't just fitness.

It's teaching your body how to adapt to moving from cycling to running efficiently.

Why Is It Called a Brick Session?

There are a few theories.

One popular explanation is that your legs can feel like bricks when you start running after a bike ride.

If you've ever stepped off a bike and felt awkward, heavy, or uncoordinated, you'll understand why.

Another theory is that the sessions "stack" disciplines together like building bricks.

Whatever the true origin, the name has stuck.

And every triathlete knows the feeling.

Why Running After Cycling Feels So Strange

One of the biggest surprises for beginner triathletes is how different running feels after riding a bike.

You might be able to run comfortably on fresh legs.

You might be able to cycle comfortably on fresh legs.

But combine the two and suddenly things feel different.

Common sensations include:

• Heavy legs

• Tight hips

• High heart rate

• Awkward running form

• Shortened stride length

This happens because cycling and running use muscles differently.

Your body needs time to adapt from one movement pattern to another.

Brick sessions teach it how.

The Benefits of Brick Training

Improved Race-Day Confidence

One of the biggest benefits is confidence.

Many first-time triathletes worry about what the run will feel like after the bike.

Brick training removes that uncertainty.

Instead of experiencing it for the first time during a race, you've already practised it multiple times.

That confidence can make a huge difference.

Better Running Off the Bike

The more you practise running after cycling, the more efficiently your body learns to transition between the two disciplines.

Athletes often notice:

• Smoother running mechanics

• Better pacing

• Less discomfort early in the run

Over time, the transition becomes far less dramatic.

Improved Pacing Awareness

Many beginners make the mistake of riding too hard before the run.

Brick sessions help athletes understand:

• How hard they can ride

• How that effort affects their run

• What sustainable race pacing feels like

This knowledge is incredibly valuable on race day.

Mental Preparation

Triathlon is as much mental as physical.

Brick sessions teach athletes how to:

• Manage discomfort

• Stay focused

• Adapt to changing sensations

These skills become important when fatigue builds during a race.

Do Beginners Need Brick Sessions?

Absolutely.

In fact, beginners may benefit from brick training more than experienced athletes.

Why?

Because experienced athletes have often completed dozens or even hundreds of bike-to-run transitions.

Beginners haven't.

The goal isn't to make every session a brick workout.

It's simply to become familiar with the feeling.

Even short brick sessions can provide significant benefits.

How Often Should Beginners Do Brick Sessions?

One of the biggest misconceptions is that more brick sessions automatically mean better results.

In reality:

Most beginners only need:

One brick session per week

This is usually enough to:

• Build confidence

• Develop adaptation

• Practise pacing

Without creating excessive fatigue.

Consistency matters more than frequency.

Simple Brick Session Examples

Beginner Brick Session

• 45-minute easy bike

• 10-minute easy run

Focus:
Getting comfortable with the transition.

Sprint Triathlon Preparation

• 60-minute bike

• 15–20-minute run

Focus:
Finding race rhythm and pacing.

Standard Distance Preparation

• 90-minute bike

• 20–30-minute run

Focus:
Building endurance and practising nutrition.

Remember:

The run does not need to be long.

The goal is adaptation, not exhaustion.

Common Brick Session Mistakes

Running Too Fast

This is by far the most common mistake.

Athletes often feel excited and push the pace immediately.

Instead:

Start controlled.

Allow your body to settle.

Riding Too Hard

If you completely empty the tank on the bike, the run becomes survival rather than productive training.

Brick sessions should support learning and adaptation.

Not prove toughness.

Making Every Bike Ride a Brick

More is not always better.

Most training sessions should still focus on individual disciplines.

Brick sessions are just one tool within a balanced programme.

Ignoring Nutrition

For longer bricks, nutrition matters.

Practising race-day fuelling strategies during brick sessions can be extremely valuable.

Should Brick Sessions Be Race Pace?

Sometimes.

But not always.

For beginners, most brick sessions should be:

• Controlled

• Comfortable

• Focused on learning

As races approach, some sessions may include race-specific efforts.

The goal is to simulate race-day demands without creating excessive fatigue.

Are Brick Sessions Only for Sprint Triathletes?

Not at all.

Athletes racing:

• Sprint Triathlon

• Standard Distance

• Ironman 70.3

• Ironman

Can all benefit from brick training.

The structure simply changes depending on the race distance and athlete's experience.

The Biggest Lesson From Brick Training

Perhaps the greatest benefit of brick sessions is discovering that the strange feeling doesn't last.

Most athletes find that after a few minutes:

• Their stride normalises

• Their breathing settles

• Their rhythm returns

What feels awkward initially becomes manageable.

And eventually, it becomes normal.

That's exactly why brick training works.

Final Thoughts

Brick sessions are one of the simplest yet most effective tools in triathlon training.

They help beginner athletes:

✔ Gain confidence
✔ Improve race-day readiness
✔ Learn pacing
✔ Adapt to running off the bike
✔ Reduce surprises on race day

You don't need complicated workouts.

You don't need huge training volume.

You simply need consistent practice.

The more familiar the bike-to-run transition becomes in training, the more comfortable and confident you'll feel when race day arrives.

At Frederick Webb Triathlon, we help athletes of all abilities prepare for race day through personalised training plans, structured brick sessions, and expert coaching support.

Whether you're training for your first sprint triathlon or your first Ironman, the right preparation can make all the difference.

Ready to train smarter and race with confidence? Get in touch with Frederick Webb Triathlon and start building your perfect triathlon plan today.