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04 / Pelvic · The Lower Oscillator

PelviSync. The rhythm below the spine.

The pelvis is the body's lower oscillator - a ring of bone, ligament, and muscle that has to swing in phase with the spine above it for walking, breathing, sitting, bending, and birth. When the pelvic rhythm falls out of phase, every movement above it compensates. PelviSync re-phrases the pattern.

SI · L SI · R PUBIC SYMPH.
- First Principles

The pelvis is a pendulum.

Walk 100 meters. Your pelvis has swung left-right eighty times, rotated over the weight-bearing leg eighty times, and transmitted a vertical force of 1.2× body-weight through the sacro-iliac joint on each stride. It is a structural oscillator - not a resting base.

Two joints. Three axes. One rhythm.

The pelvis articulates with the spine at the sacro-iliac joint (two of them - left and right) and with the leg at the hip joint. The symphysis pubis closes the ring at the front. Across normal gait, each SI joint rotates 2–4° of nutation, the symphysis slides 1–2 mm, and the sacrum moves in a figure-8 pattern relative to the lumbar spine above.

When that rhythm falls out of phase - pregnancy, post-natal, long desk hours, unilateral sports loading, hip surgery - the spine above it starts compensating. Low-back pain, sacro-iliac pain, groin pain, and gait asymmetry are almost always consequences of the pelvic rhythm being broken.

BROKEN · OUT OF PHASE COHERENT · IN PHASE − 8° + 12°
- Four Audiences

Who PelviSync is for.

Dedicated protocol flavours for the four patterns where pelvic rhythm is reliably broken. Same pillar, different programme.

Audience · 01
Pregnancy

Trimester-adapted low-force protocols for pelvic and lumbar discomfort. Specific positioning per trimester; birth-ball-assisted sessions in third.

Sessions · monthly → weekly
Audience · 02
Post-natal

Post-partum sacro-pelvic realignment. Typically opens at 6 weeks post-delivery (or per obstetric clearance) and runs an 8-session arc.

Sessions · 8-week arc
Audience · 03
Desk workers

Sitting-pattern SI-joint stiffness and pubic-symphysis drift. Typical presentation: end-of-day lower-back ache, poor gait cadence on weekends.

Sessions · 4-session intro
Audience · 04
Athletes

Rotational-sport asymmetries (golf, tennis, hockey) and endurance-sport one-sided loading. Coordinated with the member's coach; session timing aligned to training blocks.

Sessions · event-timed
- Not Pelvic-floor Physio

A structural pillar. Complementary to pelvic-floor PT.

Pelvic-floor physiotherapy is a different - and excellent - discipline. PelviSync does not replace it; we refer routinely when the presentation is muscular or continence-related. PelviSync is the skeletal rhythm layer.

- Pelvic-floor physiotherapy

Muscular. Internal. Continence-focused.

The appropriate specialty for pelvic-floor muscle weakness, stress incontinence, prolapse, post-partum muscular recovery, and many chronic-pelvic-pain presentations. Involves internal examination and targeted muscle re-education.

  • Internal digital examination (where indicated)
  • Kegel / reverse-Kegel retraining
  • Biofeedback for muscle recruitment
  • Stress-incontinence protocols
  • Prolapse assessment

We refer routinely · SG partners named in your chart

- PelviSync

Skeletal. External. Rhythm-focused.

A structural layer targeting the sacro-iliac joints, the pubic symphysis, and the spinal-pelvic oscillatory rhythm. No internal examination. Ideal when the pattern is mechanical - SI stiffness, sacral nutation dysfunction, gait asymmetry.

  • External instrument-assisted correction
  • SI-joint + pubic-symphysis focus
  • Sacrum figure-8 rhythm re-training
  • CellSync-tracked ROM + mobility
  • Coordinated with PF physio when indicated
- Pregnancy & Post-natal

Safe. Scaled. Through all three trimesters.

PelviSync is routinely delivered through all three trimesters of pregnancy. The low-force, instrument-assisted nature of SpinaliQ combined with trimester-specific positioning makes it particularly well-suited to pregnancy-related pelvic and lumbar discomfort.

Pregnancy is where PelviSync shines.

Relaxin softens the pelvic ligaments to prepare for birth. The side-effect is that the pelvis loses its passive stability and starts relying on active muscular guarding to hold everything in place. That is tiring, it is often painful, and it is almost always improvable.

A typical pregnancy member moves to monthly PelviSync sessions in the second trimester and weekly sessions through the last four to six weeks. Most members continue through post-natal recovery.

Obstetric clearance - We do not start pregnancy PelviSync without written clearance from the member's obstetrician or midwife. If you have a high-risk pregnancy designation, we coordinate directly with your care team.

T1 · 0–13w
Watchful baselineBaseline scan, light-force sessions as needed. Not the primary window for regular PelviSync.
OPT-IN
T2 · 14–27w
Monthly rhythmOne session per month. Side-lying positioning; SpinaliQ paediatric force profile. Pubic-symphysis and SI joint focus.
STANDARD
T3 · 28–40w
Weekly · last 6 weeksBirth-ball supported sessions. Focus on sacral mobility for birth preparation. Breath-cadence coaching.
WEEKLY
Post · 6w+
8-session recovery arcOpens at 6 weeks post-delivery (or per obstetric clearance). SI realignment, sacral rhythm, PF-physio coordination.
8-WEEK
- Between Sessions

Three home drills. Every PelviSync member.

Pelvic rhythm is a habit. The in-clinic work teaches it; the home drills maintain it. Every PelviSync member leaves session one with three specific drills chosen from our library based on their scan pattern.

01 / Mobility
Cat-cow cadence

Two minutes, twice daily. Re-trains the sacral figure-8 rhythm that most desk-workers have unlearnt. Done on all fours at home, pace matched to your breath.

- 2 × 2 MIN / DAY
02 / Gait
Step-rate target

Walk at 105–110 steps per minute (wearable-tracked), 15 minutes continuous. Re-establishes the left-right-left pelvic oscillation that sedentary days dismantle.

- 15 MIN · 105–110 SPM
03 / Floor
Supine sacral release

Five minutes, before bed. Knees to chest, slow pelvic circles each direction. Simple, forgiving, and quietly one of the most requested "this works" drills in our library.

- 5 MIN / NIGHT
- FAQ · PelviSync

Specific pelvic questions.

Is PelviSync internal?

No. PelviSync is fully external - instrument-assisted correction delivered through the skin over the SI joints, pubic symphysis, and sacrum. If you need internal pelvic-floor work, we refer to a trusted pelvic-floor physiotherapist and coordinate with them.

Can I do PelviSync while pregnant?

Yes - routinely, safely, and with obstetric clearance. The low-force instrument-assisted nature of SpinaliQ is actively well-suited to pregnancy-related pelvic discomfort. We use trimester-specific positioning (side-lying in T2, birth-ball-supported in T3) and never work the abdomen directly.

How soon after birth can I start again?

Typically six weeks post-vaginal-delivery; eight to twelve weeks post-caesarean. Always with your obstetrician or midwife's written clearance. The post-natal arc opens with a fresh baseline scan and an eight-session programme focused on SI realignment and sacral rhythm.

Does PelviSync help with urinary incontinence?

Not directly - incontinence is primarily a pelvic-floor muscle issue, and pelvic-floor physiotherapy is the right discipline. Some members report incontinence improvement as a side-effect of PelviSync because the SI-joint alignment changes recruit the pelvic floor more efficiently, but we do not market PelviSync as a continence treatment.

I had a hip replacement. Is PelviSync safe?

Usually yes, with orthopaedic clearance and after the first 6 months post-op. We avoid direct impulse on the implant hardware and work primarily at the SI joints and sacrum. Your clinician will document the implant and adapt the session plan.

Does it replace the postnatal physio I'm already doing?

No - they complement each other. Pelvic-floor physiotherapy handles the muscular layer; PelviSync handles the skeletal-rhythm layer. Most post-natal members benefit from both running in parallel, and the two disciplines share notes (with your consent).

Pelvis in phase. Everything above feels lighter.

Start with a First Sync - your CellSync scan will tell us if PelviSync is the priority pillar for your presentation.