Pilates Form: The Hundred, Roll-Up, and Core Technique
Good Pilates form means a stable, imprinted core — ribs down, lower back controlled — with movements driven by the deep abdominals rather than momentum or the hip flexors. Formfix checks your form from a single iPhone photo or video and returns a 0–100 score with the #1 thing to fix in under 15 seconds.
Pilates looks gentle but the details are demanding — the hundred, the roll-up, and the teaser all live or die on core control. This page covers the key form points for the most-practiced exercises, common mistakes, and how to film your practice for analysis.
Download Formfix on the App StoreWhat good pilates form looks like
The hundred: stable tabletop
Legs in tabletop (or extended at a height you can control), lower back staying still on the mat — the legs only go as low as your core can hold.
The hundred: pumping from the shoulder
Arms pump in small, controlled pulses from the shoulder, shoulders away from the ears, neck long — not flapping from the elbows.
Roll-up: one vertebra at a time
You peel up and down through the spine sequentially — no jerking, no using momentum to get up.
Ribs down, core imprinted
Through every exercise, the ribs stay knitted down and the deep core stays engaged — no rib flare when the arms or legs move.
Neck long, gaze right
In curled-up exercises, the chin stays slightly tucked with a long neck — not craning forward.
Breath drives the movement
Exhale on effort, inhale to prepare — the breath is part of the technique, not an afterthought.
Most common mistakes and how to fix them
Lower back arching in the hundred
Why it happens: Legs lowered beyond what the core can hold makes the back pop off the mat.
Fix it: Cue 'lower back heavy, legs higher.' Raise the legs until your back stays still — tabletop is always an option. Lower only as strength builds.
Neck straining in curl-ups
Why it happens: Pulling on the neck or craning the chin forward instead of lifting from the core.
Fix it: Cue 'chin tucked, lift from the ribs.' Imagine holding an apple under your chin and curl from the ribs down — hands lightly support the head, never pull it.
Using momentum in the roll-up
Why it happens: Jerking or swinging to get up skips the deep core work that's the entire point.
Fix it: Cue 'peel slowly, exhale up.' Go slower than feels necessary. If you can't get up without momentum, bend the knees or hold light weights as a counterbalance.
Rib flare when arms go overhead
Why it happens: The ribs popping up as the arms move means the core disengaged.
Fix it: Cue 'ribs down as arms move.' Only take the arms as far back as you can keep the ribs knitted — range comes with control.
Gripping the hip flexors
Why it happens: The front of the hips doing the work the deep abs should do — common in leg-lowering exercises.
Fix it: Cue 'deep belly, quiet hips.' Reduce the range until the hip flexors stop dominating, and exhale fully on the effort.
How to film it for analysis
Camera angle
Side-on at mat height is the key angle — it shows lower-back position, rib flare, and neck alignment in one view.
Distance
5–8 feet (1.5–2.5 m) away, framing your whole body on the mat.
Framing
Prop the phone still at floor level and film a full set — form drift across 100 pumps or 10 roll-ups is exactly what you want to see.
FAQ
How do I do the Pilates hundred correctly?
Curl up from the ribs with a long neck, legs in tabletop or extended only as low as your core can hold without the back arching, and pump the arms in small pulses from the shoulder while breathing in for 5 and out for 5. The lower back staying still is the whole test.
Why does my neck hurt during Pilates?
Usually from craning the chin forward or pulling on the head in curl-up exercises. Keep the chin slightly tucked, lift from the ribs, and let your hands support — not pull — your head.
Should my lower back touch the mat in Pilates?
In most exercises, yes — an imprinted or neutral spine held still against the mat is the standard. If your back arches when your legs lower, your legs are too low for your current core strength.
Why can't I do a roll-up without jerking?
The roll-up demands sequential spinal control and deep core strength — jerking means momentum is replacing muscle. Slow down, exhale as you peel up, and bend your knees as a regression until the control is there.
How do I check my Pilates form?
Film yourself side-on at mat height and check the lower back, ribs, and neck. Upload to Formfix for a 0–100 score and the #1 fix in under 15 seconds.
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