Chelsea has its restaurants, its galleries and its tailors. This winter, it gains a strength studio to match.
Intension is the strength studio Chelsea has been waiting for: a calm, considered space at 6 Burnsall Street, a few steps from the King's Road, dedicated to one discipline taught properly. That discipline is the Tension Method, a 50-minute slow resistance strength workout performed on the Tensionformer, a carriage machine built to our specification.
Opening dates
Intension Chelsea opens with a soft launch in December, followed by our main launch in early January. From opening day, classes run from 6:00am to 9:00pm, so a session fits before the office, between meetings or at the end of the day.
The soft launch is the moment to come in early, meet the team and find your rhythm before the new year begins in earnest.
£10 classes for December
To celebrate Christmas and our soft launch, we’re offering £10 classes for 12 days.
What is the Tension Method?
The Tension Method is a personalised workout delivered in a group setting. It rests on three principles: progressive overload, time under tension, and core connection.
Movements are slow, prolonged and precise. Rather than rushing through repetitions, you keep each muscle working under load until it reaches failure. Expect trembling muscles and a deep, lasting burn. When the springs alone are not enough, dumbbells from 5kg to 12.5kg are introduced to take you all the way.
This is strength training first. It is not a stretch class and it is not designed to relax you. It is designed to make you stronger.
Why slow resistance
Speed can hide a great deal. Momentum carries a movement through its hardest moments, and the muscle you meant to train ends up doing less of the work. Slowing down removes that shortcut. Each repetition becomes deliberate, each hold becomes honest, and the muscle stays under tension from start to finish.
The result is a workout that is quiet, focused and far more demanding than its pace suggests. Progress comes from steadily raising the challenge over time, which is the principle of progressive overload at the heart of the Method. It is also why the Method rewards patience: the slower you go, the harder the muscle has to work.
The Tensionformer
Every class takes place on the Tensionformer, a spring-loaded sliding carriage trainer specified by Intension. It brings together cables, springs, a foot bungee, poles and dumbbells, with handles placed for a comfortable, secure grip.
The Method and the machine were developed together. Every exercise and every resistance level has been built around the Tensionformer, so the two work as one.
What to expect in the studio
Intension Chelsea has 14 Tensionformers arranged in two rows of seven. Classes are capped at 14 people, so every member has their own machine and the instructor can see, correct and encourage everyone in the room.
Classes last 50 minutes. Your instructor guides you through the session, adjusting resistance and progressions so the workout meets you where you are, whether you are new to strength training or have years of experience behind you.
For your first visit, arrive 5 minutes early and your instructor will introduce you to the Tensionformer before class begins.
Our studio on Burnsall Street (just off the King's Road) has a lounge area with cold drinks, changing facilities, a fully stocked vanity area and restrooms, but it does not have showers.
Who Intension is for
Intension is for people who want to become stronger and value precise, attentive coaching. You do not need prior experience on a carriage machine. You do need a willingness to work hard, because every class asks you to reach your own limit.
If you already train, the Method offers a fresh and exacting challenge. If you are new to strength work, it offers a structured, well-coached place to begin.
A studio built for Chelsea
Intension was created for people who hold every part of their life to a high standard, their training included. We have brought the standards of high-end hospitality into a serious strength studio, and we would like members to treat it as an extension of their home.
Find us
Intension Chelsea
6 Burnsall Street, Chelsea, London SW3 3ST
Just off the King's Road
Telephone: 020 3432 4622
Email: info@withintension.com
Be among the first
Visit during our December soft launch and get £10 classes. Our doors open in December, and we look forward to welcoming you to Intension Chelsea.