A teacher crouching beside a folded-forward student while the rest of the class holds the same shape
Calcaire · Rue de Bomel 41 · Namur

Hold an hour.

Forty-one sessions a week, eight mats in the room, and the whole timetable printed before you are asked for a card. Twelve euro for the first one, whichever one you pick.

Thursday7 sessions · 06:45 — 20:25
  • 06:45Early Forty40′2 left
  • 08:00First Six Weeks55′4 left
  • 09:10Long Hour60′full
  • 13:00Thirty at One30′5 left
  • 17:30Load55′1 left
  • 18:40Spine50′3 left
  • 20:00Quiet Twenty-Five25′6 left
Calcaire — Calcaire — CalcaireTuesday 09:10, the Long Hour, second row from the windows
A row of people holding a high plank on pink mats, the nearest one looking down the line
M6T7W6T7F6S5S4
Sessions per day, this term · Wednesday 18:15, Strong Backs
What the place is

We sell one thing, and it is an hour of your week.

Margaux Thiry took the first floor of a print works on Rue de Bomel in 2017 because it had a sprung floor already down and a landlord who did not mind the noise at seven in the morning. The room holds eight mats. It has held eight mats every week since, through two winters when it held four, and nobody has ever been squeezed in as a ninth.

Capacity
8 on the floor · 4 on the machines · never more
Shortest session
25 minutes · €14 · four of them in the week
Longest
100 minutes · Saturday 10:15 and Sunday 09:00
Waiting list, March
9 days for a 17:00 · same week for anything before 09:00
What we will not do
Sell a year up front, run a session with one person in it, or put a camera in the room
A woman arched backwards over a wooden curve with wall bars behind her
Monday 17:15 · Spine · 50 minutes
Balls, rings and short bars hung in order on a slatted timber wall
The wall, counted out every Sunday night
A single exercise ball resting against a window on a bare parquet floor
06:20, before the first forty
WEEK
The measure, and what it costs

One day, drawn the same way on every page of this site.

Every session you will see is set against one fixed day, 06:30 to 21:00. A twenty-five minute row is a quarter of the length of a hundred-minute row because that is what it is. Nothing on this site is drawn longer than it runs.

  • OnceFirst session, any session on the sheet
    Booked in the room or by phone€12
  • SingleDrop in on anything marked Level 1 or 2
    €14 for the twenty-fives€22
  • TenTen sessions, used in any order, six months to use them
    Shareable with one other person€195
  • FourFour a month, booked a fortnight ahead
    Rolls over once, never twice€74
  • EightEight a month, the one most people end up on
    Includes the Saturday hundred€132
  • AllEvery session in the week you can physically get to
    Capped at two a day, by us, for you€178
Start on the twelve
06:45 — 07:40 · Thursday · Early Forty becomes the Long Hour at 09:10

Fifty-five minutes, and where every one of them goes.

Three people on mats in a studio holding the same side bend, the nearest one looking along the line07:14 · the middle thirty · nobody is counting out loudTwo people lying back on mats with their legs over their heads, near the end of a session07:36 · six minutes down · the blinds go up

Fifty-five is the only length where all five of these fit. The forty drops the floor work at the start; the twenty-five is the middle and nothing else; the hundred does all five twice over with a sit-down between them.

06:45

Names, and what hurts this week

Five minutes standing in a loose ring. If a knee is new, say so now and not at minute forty. Eight people, so it takes as long as it takes.

06:50

Twelve minutes on the floor before anything is loaded

Breathing, ribs, feet. It looks like the easy part and it is the part people skip at home, which is why half of them are here.

07:02

The middle thirty — the work

Three blocks of ten, each one harder than the last, each one with a way out that is not a failure. This is the only stretch of the session where the teacher stops talking.

07:32

Six minutes down

Lying flat with the blinds up. Not a relaxation, a reset — you are leaving for work in a quarter of an hour and we would rather you left level.

07:38

Two minutes at the door

One thing to do before the next session, said out loud, never written on a card. If you cannot remember it by Saturday it was the wrong thing to ask for.

Four levels · printed on every row of the sheet

You are told which one you are in, and when you have left it.

A woman holding a balanced V-shape on a mat in a pale, bare roomThursday 08:00 · First Six Weeks · week four of six
Level 1

Your first six weeks

Eleven sessions a week carry it. You are told what to do and then why, in that order, and somebody checks you have done it rather than assuming. Nobody stays here longer than two months unless they want to.

11 sessions · 25 to 55 min · First Six Weeks, Return, Quiet Twenty-FiveFullest: Tuesday 09:00, Return — 5 of 8 open this week
Level 2

Open

The bulk of the sheet and the reason the room is full at half five. You know the shapes; the work is in holding them for longer than is comfortable while somebody tells you your left side is cheating.

17 sessions · 40 to 100 min · Early Forty, Long Hour, Spine, Slow HundredFullest: Saturday 08:00, Long Hour — closed, four on the list
Three people on mats with their legs lifted, a window behind themSaturday 08:00 · Long Hour · the last eight minutes
A woman folded forward over a straight leg, reaching for her foot in a bright roomWednesday 07:15 · Spine · minute twenty-two
Level 3

Quick

Nothing is explained twice and the breaks are shorter. You get in at 17:30, you are working by 17:34. Ten sessions, and three of them are the only ones in the week that regularly sell out a fortnight ahead.

10 sessions · 30 to 55 min · Thirty at One, Load, Strong BacksFullest: Monday 12:30, Thirty at One — closed since February
Level 4

By invitation, and only two of them

Tuesday 18:30. That is the whole list. Margaux asks you; you cannot book your way in, and twice a year somebody is asked to go back to Level 3 for a term, which is not a punishment and is always explained in person.

1 session · 55 min · Load, Tuesday 18:30 · 2 of 8 openLast two people asked: October and March. Nobody has been turned down twice.
A woman setting up under a loaded barbell while a coach watches from behind the rackTuesday 18:30 · Load · the only Level 4 in the week
An empty first-floor hall, tall windows reflected the length of a worn timber floor
Thursday · Friday · Saturday

Three days of it, drawn to length.

The blocks are as tall as the sessions are long. The rest of the week is on the timetable, and so is every seat still open on it.

The whole sheet →
  • No session runs with fewer than three people booked
  • No session is added mid-term without a fortnight's notice
  • Nothing on this sheet is a taster, a trial or an intro offer
Places left
Closed
The hundred
Thu
06:45Early Forty2
08:00First Six Weeks4
09:10Long Hour0
13:00Thirty at One5
17:30Load1
18:40Spine3
20:00Quiet Twenty-Five6
Fri
06:45Early Forty3
07:40Strong Backs2
09:00Return4
12:30Thirty at One0
16:45Long Hour2
17:55Spine5
Sat
08:00Long Hour0
09:15Strong Backs1
10:15Slow Hundred2
12:10Return6
13:10Quiet Twenty-Five4
The hall at 06:12, before Thursday
Next first sessions · Thursday 08:00 · Saturday 12:10

Pick an hour. Pay twelve euro. Decide afterwards.

No form before you come, no consultation to book first, no card held on file. Turn up ten minutes early, tell whoever is on the door it is your first, and bring socks.

  • CancellingFour hours before, and the seat goes back on the sheet
  • PausingAny month, for any reason, told to us by text
  • LeavingOne month's notice and no conversation about why
A close crop of a back and hip folded over on a mat, grey light across the ribsSunday 11:55 · Spine · the last six minutes