INTENSION
Your new strength obsession.
Launching December. King’s Road, Chelsea.
TONE
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SWEAT
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SHAKE
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BURN
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FAIL
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BREATHE
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GROW
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TONE | SWEAT | SHAKE | BURN | FAIL | BREATHE | GROW |
PRE-LAUNCH CLUB
Join our pre-launch club for access to exclusive pricing, memberships and merchandise only available before our grand opening on the 1st of December.
A STRONGER YOU, EVERY WEEK.
The Tension Method.
Developed in London by combining the cities best instructors, Tension is a 50 minute personalised workout delivered in a group setting.
It combines the principles of progressive overload, time under tension and core connection. Through prolonged, precise movement you’ll sweat, shake and burn.
The only workout you need to be in the best shape of your life, sustainably.
THE TENSIONFORMER
Designed for time under tension, the Tensionformer is a spring loaded carriage trainer built for slow, controlled strength work.
Cables, springs, sliding carriage, bungee, dumbbells. The ultimate combination to sculpt a stronger you, every week.
PRE-LAUNCH CLUB
Join our pre-launch club for access to exclusive pricing, memberships and merchandise only available before our grand opening on the 1st of December.
PRE-LAUNCH CLUB
Be the First in the Studio
FAQs
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Intension is built around one idea: slow, controlled strength training done properly. Every 50-minute Tension Method class is taught on the Tensionformer in a small group of up to 14, so your instructor can coach you closely in a calm, elevated space.
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A 50-minute slow resistance strength class, built on progressive overload, time under tension and core connection. Every movement is slow, precise and taken to the point of failure. Personal coaching, delivered in a small group.
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Reformer Pilates centres on control, mobility and stretch. The Tension Method is strength training: slower, more demanding and built around working each muscle to failure. Expect to leave thoroughly worked, not stretched out.
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Every class is 50 minutes and capped at 14 people, one Tensionformer each. Small enough for your instructor to see, correct and push everyone in the room.
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The Tensionformer is the spring-loaded carriage machine every Intension class is taught on, designed for slow, controlled strength work. Springs, cables, a foot bungee and dumbbells combine to give a wide resistance range, from fine first steps to serious load.
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No. Intension is an independent strength studio, not affiliated with Lagree Fitness. The Tension Method is our own programme, taught on the Tensionformer.
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Yes. Your instructor sets your resistance and progressions, so you can start light while the person beside you works at their limit. Arrive a little early for your first Intension class and we will introduce you to the Tensionformer.
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Wear fitted, comfortable activewear that lets you move freely, and bring a bottle of water. If you have any questions before your first Intension class, our team is happy to help.
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Consistency matters more than any single session, so build a routine you can keep, with time to recover between classes. Your instructor will help you find the right rhythm as you progress at Intension.
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Intension Chelsea is at 6 Burnsall Street, Chelsea, SW3 3ST, just off King's Road. We are a short walk from Sloane Square and South Kensington stations.
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Intension is opening in December 2026. Classes run from 6am to 9pm, seven days a week, and you can book through our Schedule page.