Your First Brick Workout: A Triathlon Coach's Guide

If you've never done a brick workout, meaning a bike ride immediately followed by a run, I can tell you exactly what's going to happen the first time. You'll get off the bike, start running, and your legs will feel like they belong to someone else. Heavy, stiff, a little uncoordinated. That's completely normal, and it's exactly why we practice it.

Racing a triathlon isn't just biking fitness plus running fitness added together. Your body has to learn how to transition from one motion pattern to a completely different one, under fatigue, and that skill only comes from practicing the transition itself. Here's how I build that into a new triathlete's training.

Start short, and start simple. Your first few bricks don't need to simulate race day. A 30 to 40 minute easy bike ride followed by a 10 to 15 minute easy run is enough to introduce your body to that transition feeling without wrecking your legs for the rest of the week. The goal early on is exposure, not intensity.

Nail your transition logistics before you worry about pace. Practice actually racking your bike, getting your shoes on, and getting moving. I've had athletes lose more time fumbling through their first real transition than they ever lost on the run course. Rehearsing this in training removes one more thing to think about on race day.

Build toward race-specific effort over time. As you get more comfortable with the sensation, start including bricks that better mirror your actual race, longer rides at goal race effort followed by a run at your intended race pace. This is where you learn what your real sustainable pace looks like off the bike, which is often slower than your standalone run pace, and that's valuable information before race day, not on it.

Do them consistently, not constantly. One well-structured brick every one to two weeks is plenty for most age-group triathletes. This isn't a workout to overdo. It's a skill to rehearse.

The first time your legs feel foreign running off the bike can be discouraging if you don't know it's coming. Once you understand it's a normal, trainable sensation and you've practiced through it a handful of times, it stops feeling like a mystery and starts feeling like part of your race plan.

If you're training for your first 70.3 or full distance race and want a coach who structures this progression for you instead of guessing at it, I'd love to talk. You can see how triathlon coaching works here, read about my background racing as a professional triathlete, or reach out and tell me about your race.

You can also check out what other athletes have said about their first triathlon experience working with me, or browse the blog for more training content while you build toward race day.

Coach Justin