Behind the scenes · Chapter 1
The swim was the part you dreaded.
Not anymore.
We've been heads-down for years, building ZWIM. This is the first real look, shot in Mallorca with the Bianchi pro team.
You measure everything. Except the swim.
Your bike has power. Your run has pace. The swim? You cross your fingers and hope. You don't hate swimming, you hate getting to the pool, and you can't get there enough.
So you made peace with it. "Just survive the swim," you tell yourself. "My race starts on the bike anyway." It quietly became the plan. You would never settle like that anywhere else in your life. So we set out to change it, and make the days between pool days count.
Chapter 1 · The data viewer
We built a way to measure every stroke.
Every stroke on the ZWIM bench gives you Propulsive Watts: the power that actually moves you forward. You see it on screen in real time, while you train.
Propulsive Watts. The number underneath everything ZWIM does.
Pace only tells you how fast you went. Propulsive Watts tells you how much of your effort actually counted. That's the thing we always wanted to see in the swim, so it's the first thing we built.
The game
But the number on the screen won't get you back to train tomorrow.
So we made it fun.
The game runs on your Propulsive Watts, the force that actually moves you forward. Not how hard you thrash, how much of your effort turns into speed. Sharpen the catch, cut the wasted energy, and the world moves faster around you. The game teaches efficient swimming, because efficiency is the only thing that wins.
Maybe you grew up gaming, and the kid who chased the next level never left. Maybe you just want training that's actually fun. Either way, we built it for you, and for the athlete you've become.
The full reveal is Chapter 2.
See for yourself
We gave it to the pros. Watch what happened.
No script. We handed the trainer to the Bianchi Pro Triathlon Team and their coaches in Mallorca, and rolled the camera.
Why we started
Built by the people who needed it.
Victor, co-founder
It started with a panic attack at 200 metres, my first triathlon. I finished that race certain I didn't belong in the sport.
Then COVID took both our jobs in the same week. So Charlotte, my co-founder and fiancée, and I built the thing we wished existed, on our living room floor. We called it ZEN8 - ZWIM AT HOME™. Twenty thousand people showed up and started calling themselves Zwimmers.
The ones who kept training at home got faster. But keeping it up was the hard part, and they told us, over and over. So we bet everything on fixing it. We sold our home, moved to Lisbon, and took no salary for five years. By the end of 2025 we were nearly out of road. We kept building.
This is what we built for them. We're age-group triathletes ourselves, so we knew exactly what they were missing. It's a long way from that living room now: six years of R&D, world-class sports scientists, and a real engineering team behind every number it reads.
Victor & Charlotte
The series