42 classes today · 6 studios

Burn more in 50 minutes

Coach-led, heart-rate-based interval training. Hit the orange zone for 12 minutes and keep burning for up to 36 hours after class.

kcal per class
500+
orange-zone minutes
12
afterburn
36h
45:00HIIT 50 · round 3 of 5
Zone 4

642 kcal

168 bpm

The science

Train in the zone

Every member wears a heart-rate monitor. The screens show your zone live, so you know exactly when to push and when to recover.

36h of afterburn after 12 minutes in zones 4–5
  1. Warm-up50–60%Easy pace, loosen up
  2. Fat burn61–70%Comfortable, sustainable
  3. Base71–83%Challenging but doable
  4. Orange zone84–91%Where the afterburn starts
  5. All out92–100%Short, max-effort bursts

Pick your burn

Classes that hit different

Every class is coached, timed to the second and scaled to you — beginners welcome.

  • 50 min

    HIIT

    Treadmill, rower and floor blocks. Five rounds, zero boredom.

    500–800 kcal

    Intensity

    Book HIIT
  • 45 min

    Strength

    Progressive lifting with tempo work and finisher circuits.

    400–600 kcal

    Intensity

    Book Strength
  • 45 min

    Ride

    Rhythm-driven indoor cycling with climbs and sprints.

    450–700 kcal

    Intensity

    Book Ride

This week

Grab your spot

Classes open for booking 7 days ahead. Cancel up to 8 hours before for free.

MondayToday

  • 06:00 HIIT 50 Maya · 50 min 3 spots left Book
  • 12:15 Strength 45 Leo · 45 min 11 spots left Book
  • 18:30 Ride 45 Ana · 45 min Full Waitlist

Tuesday

  • 06:30 Ride 45 Kai · 45 min 16 spots left Book
  • 17:45 HIIT 50 Maya · 50 min 1 spot left Book
  • 19:00 Core & Flow Sasha · 30 min 12 spots left Book

Wednesday

  • 07:00 Strength 45 Leo · 45 min 8 spots left Book
  • 12:15 HIIT 30 Ana · 30 min 20 spots left Book
  • 18:00 HIIT 50 Kai · 50 min 5 spots left Book

The app

Every beat, tracked

See your live stats on the studio screens, then get a full breakdown on your phone the moment class ends.

  • Workout summariesCalories, zones and points after every class.
  • Book in two tapsWaitlist alerts when a spot opens up.
  • Streaks & challengesMonthly leaderboards across every studio.

Your first class is on us

Book any class, borrow a heart-rate monitor and meet your coach 15 minutes early. No card needed.

  • Free heart-rate monitor for the class
  • 1:1 intro with your coach
  • Towel, locker and shower included
Book my free class

Intro pass

1 class · $0

Valid at all studios · new members only

Promo code FIRSTBURN