Whole-Body Mobility Assessment

Are you constantly tight — and tired of finding out why the hard way?

Six zones. One reading each. We test your neck, shoulder, upper back, low back, hip, and calf the way a technician reads a dashboard — so you know exactly which ones have drifted out of range, instead of guessing at the next thing that's going to lock up on you.

  • Constantly tight, no matter how much you stretch or foam roll
  • You get adjusted regularly, but have no way to hold onto it yourself
  • Little things keep breaking down — and you want a whole-body answer, not another patch
NO GUESSWORK · SIX READINGS · ONE PLAN YOU CAN RUN YOURSELF
The Problem

Chasing the symptom means you never see the whole panel.

Most care stops at the spot that hurts. That's like reading one gauge on the dash and ignoring the other five — you fix the light that's flashing, and six weeks later a different one comes on.

Tight, all the time

You stretch, you roll, you still wake up stiff. That's usually not "tight muscles" — it's one or two zones quietly running outside their working range, and everything around them tensing up to compensate.

Adjusted, but not equipped

You feel better leaving the office and worse again in a week — because nobody handed you a way to check or hold your own progress between visits. You're a passenger in your own maintenance.

Things keep breaking down

A tweak here, a twinge there, one more thing that "just started happening" as you got older. Individually they look random. Read across all six zones and they usually aren't.

The System

The 6 Green Zones

Each zone gets tested for range, control, and tension — then measured against a target working range. Green means that zone can do its job without borrowing from its neighbors. Drift out of green, and something nearby starts covering for it.

ZONE 1 / TOP OF THE CHAIN

Neck

Endurance to hold your head level for hours at a time — not just how far it turns. When this fatigues, the muscles at the top of your shoulders and base of your skull take over, which is usually where tension headaches and "tech neck" actually come from.

ZONE 2

Shoulder

Control of the joint itself, not just how high the arm goes overhead. When it isn't well-stabilized, the surface muscles around it overwork to keep the arm steady — usually the difference between a shoulder that's just tired and one that's heading toward real irritation.

ZONE 3

Upper Back

Ability to stay upright through the middle of your back without rounding forward. A mid-back that gives in here is usually the real reason the neck and shoulders feel like they're always "on" — they're doing the upper back's job for it.

ZONE 4

Low Back

Fine control low in the spine, separate from how strong or flexible your back feels overall. This area carries a lot of the load during walking and standing, and it's often one of the first places compensation shows up when something above or below it isn't pulling its weight.

ZONE 5

Hip

Control of your pelvis every time you're standing on one leg — which is most of walking. A hip that isn't holding steady here is one of the most common hidden reasons a knee or low back starts complaining.

ZONE 6 / END OF THE CHAIN

Calf

The deep muscle that quietly holds you steady while standing still, helps absorb the shock of every step, and even assists blood flow back up from your legs. It's built for endurance, not sprinting — and it's one of the most overlooked zones in the entire body.

How It Works

Three steps. No guesswork, no forever-patient loop.

01

Test

We run all six zones and take an honest reading on each — not a symptom hunt, a full-panel check.

02

Target

We show you exactly which zones sit outside their range, and how that's likely feeding whatever's already bothering you.

03

Train

You leave with a short, specific routine per zone, and a way to check your own readings going forward — so you're not stuck coming back just to feel normal again.

You didn't get tight in one place. You won't fix it in one place either.

A whole-body approach means treating the six zones as one connected system — so the plan holds up in daily life, not just on the table.

Book Your 6-Zone Assessment
BONUS READOUT

Your body has an age. It might not be the one on your ID.

The same six zones roll up into a single number: your PhysioFit Age. See how it's calculated and what it means.

See PhysioFit Age →
Ready When You Are

Get a real reading on all six zones — not just the one that hurts.

Book Your Assessment
The Science

This isn't a wellness trend. It's published research.

Each of the six zones is backed by peer-reviewed research on aging, muscle function, and injury risk. Tap a zone below to see the studies behind it.

ZONE 1

Neck

8 studies+
  • Abduh HAM, Kuruma H, Otsuka T, Firdausy AM. Muscle fat infiltration and its relation with pain intensity, disability, and cervical curvature in individuals with nonspecific neck pain: a systematic review. PM R. 2026;18(7):793-802. doi:10.1002/pmrj.70064
  • Diebo BG, Chalier V, Henry JK, et al. Predicting cervical alignment required to maintain horizontal gaze based on global spinal alignment. Spine. 2016;41(23):1795-1800. doi:10.1097/BRS.0000000000001698
  • Er U, Şimşek S. Does cranial incidence angle have a role in the tendency toward cervical degenerative disc disease? J Clin Neurosci. 2022;13(2):154-158. doi:10.4103/jcrs.jcrs_145_21
  • Kennady F, Sannasi R, Premkumar M, Dsouza GA. Normative values of neck extensor endurance test in adults: an observational study. Physiother Res Int. 2026;e70162. doi:10.1002/pri.70162
  • Moustafa IM, Shousha TM, Arumugam A, Harrison DE. Is thoracic kyphosis relevant to pain, autonomic nervous system function, disability, and cervical sensorimotor control in patients with chronic nonspecific neck pain? J Clin Med. 2023;12(11):3707. doi:10.3390/jcm12113707
  • Peng Q, Zhang Y, Yang S, et al. Morphologic changes of cervical musculature in relation to chronic nonspecific neck pain: a systematic review and meta-analysis. World Neurosurg. 2022;168:79-88. doi:10.1016/j.wneu.2022.09.057
  • Vaillant J, Mouron R. Endurance test of extensor muscles of the neck: improve usability with a modification of applied load. Ann Phys Rehabil Med. 2017;60(Suppl):e56. doi:10.1016/j.rehab.2017.07.210
  • Wang DF, Liu SJ, Li Y, Liu CX, Kong C. The ratio of cervical lordosis to C7 slope represents the reciprocal change between cervical sagittal alignment and global spinal alignment. J Orthop Surg Res. 2023;18(1):138. doi:10.1186/s13018-023-03602-1
ZONE 2

Shoulder

5 studies+
  • Gomaa AR, Ahad A, Haque A, Muhammad J, Pandey R, Singh HP. Supraspinatus muscle atrophy in relation to aging with or without shoulder pathology: a radiographic study. J Clin Orthop Trauma. 2023;41:102171. doi:10.1016/j.jcot.2023.102171
  • K S M, Ulhaque F, Desai MM. Factors associated with supraspinatus atrophy in patients 50 years and older with atraumatic shoulder pain. Orthop J Sports Med. 2024;12(12). doi:10.1177/23259671241303502
  • Nakamura Y, Yokoya S, Harada Y, Shiraishi K, Adachi N, Ochi M. The prospective evaluation of changes in fatty infiltration and shoulder strength in nonsurgically treated rotator cuff tears. J Orthop Sci. 2017;22(4):676-681. doi:10.1016/j.jos.2017.02.008
  • Vervaecke AJ, Dufrenot M, Boux de Casson F, Werthel JD. Age-related and sex-related differences in rotator cuff and deltoid muscle: a 3-dimensional segmentation analysis in healthy shoulders. J Shoulder Elbow Surg. 2026. doi:10.1016/j.jse.2026.05.009
  • Wilson A, MacLean SB. Fatty infiltration in the intact supraspinatus tendon; a normal physiological response with increasing age and female gender. Shoulder Elbow. 2022;14(5):510-514. doi:10.1177/17585732211024504
ZONE 3

Upper Back

6 studies+
  • Barrey C, Roussouly P, Le Huec JC, D'Acunzi G, Perrin G. Compensatory mechanisms contributing to keep the sagittal balance of the spine. Eur Spine J. 2013;22(Suppl 6):S834-841. doi:10.1007/s00586-013-3030-z
  • Briggs AM, van Dieën JH, Wrigley TV, et al. Thoracic kyphosis affects spinal loads and trunk muscle force. Phys Ther. 2007;87(5):595-607. doi:10.2522/ptj.20060119
  • Hasegawa K, Okamoto M, Hatsushika S, Shimoda H, Ono M. The whole axial skeleton with reference to the gravity line in humans. J Anat. 2017;230(5):619-630. doi:10.1111/joa.12586
  • Lamartina C, Berjano P. Classification of sagittal imbalance based on spinal alignment and compensatory mechanisms. Eur Spine J. 2014;23(7):1171-1189. doi:10.1007/s00586-014-3227-9
  • Neal CJ, McClendon J Jr, Halpin RJ, Acosta FL, Koski T, Ondra SL. Predicting ideal spinopelvic balance in adult spinal deformity. J Neurosurg Spine. 2011;15(1):82-91. doi:10.3171/2011.2.SPINE1018
  • Roussouly P, Pinheiro-Franco JL. Biomechanical analysis of the spino-pelvic organization and adaptation in pathology. Eur Spine J. 2011;20(Suppl 5):609-618. doi:10.1007/s00586-011-1928-x
ZONE 4

Low Back

9 studies+
  • Barker KL, Shamley DR, Jackson D. Changes in the cross-sectional area of multifidus and psoas in patients with unilateral back pain: the relationship to pain and disability. Spine. 2004;29(22):E515-519. doi:10.1097/01.brs.0000144405.11661.eb
  • Biering-Sørensen F. Physical measurements as risk indicators for low-back trouble over a one-year period. Spine. 1984;9(2):106-119. doi:10.1097/00007632-198403000-00002
  • Dallaway A, Kite C, Griffen C, Duncan M, Tallis J, Renshaw D, Hattersley J. Age-related degeneration of the lumbar paravertebral muscles: systematic review and three-level meta-regression. Exp Gerontol. 2020;133:110856. doi:10.1016/j.exger.2020.110856
  • Hides JA, Richardson CA, Jull GA. Multifidus muscle recovery is not automatic after resolution of acute, first-episode low back pain. Spine. 1996;21(23):2763-2769. doi:10.1097/00007632-199612010-00011
  • Martínez-Romero MT, Ayala F, De Ste Croix M, et al. A meta-analysis of the reliability of four field-based trunk extension endurance tests. Int J Environ Res Public Health. 2020;17(9):3088. doi:10.3390/ijerph17093088
  • Parrella M, Arvanitidis M, Macaluso A, et al. The effects of ageing on fatigue and endurance of the spinal extensor muscles: a systematic review and meta-analysis. GeroScience. 2025. doi:10.1007/s11357-025-01987-x
  • Ranger TA, Cicuttini FM, Jensen TS, et al. Are the size and composition of the paraspinal muscles associated with low back pain? A systematic review. Spine J. 2017;17(11):1729-1748. doi:10.1016/j.spinee.2017.07.002
  • Seyedhoseinpoor T, Taghipour M, Dadgoo M, et al. Alteration of lumbar muscle morphology and composition in relation to low back pain: a systematic review and meta-analysis. Spine J. 2022;22(4):660-676. doi:10.1016/j.spinee.2021.10.018
  • Shaw J, Jacobs JV, Van Dillen LR, Beneck GJ, Smith JA. Understanding the Biering-Sørensen test: contributors to extensor endurance in young adults with and without a history of low back pain. J Electromyogr Kinesiol. 2024;74:102854. doi:10.1016/j.jelekin.2023.102854
ZONE 5

Hip

6 studies+
  • Kivle K, Lindland ES, Mjaaland KE, Svenningsen S, Nordsletten L. Gluteal atrophy and fatty infiltration in end-stage osteoarthritis of the hip: a case-control study. Bone Jt Open. 2021;2(1):40-47. doi:10.1302/2633-1462.21.BJO-2020-0179.R1
  • Marshall AR, Noronha M, Zacharias A, Kapakoulakis T, Green R. Structure and function of the abductors in patients with hip osteoarthritis: systematic review and meta-analysis. J Back Musculoskelet Rehabil. 2016;29(2):191-204. doi:10.3233/BMR-150614
  • Rostron ZPJ, Zacharias A, Semciw AI, et al. Effects of a targeted resistance intervention compared to a sham intervention on gluteal muscle hypertrophy, fatty infiltration and strength in people with hip osteoarthritis. BMC Musculoskelet Disord. 2022;23(1):944. doi:10.1186/s12891-022-05907-4
  • Takano Y, Kobayashi H, Yuri T, Yoshida S, Naito A, Kiyoshige Y. Fat infiltration in the gluteus minimus muscle in older adults. Clin Interv Aging. 2018;13:1011-1017. doi:10.2147/CIA.S157402
  • Zacharias A, Pizzari T, English DJ, Kapakoulakis T, Green RA. Hip abductor muscle volume in hip osteoarthritis and matched controls. Osteoarthritis Cartilage. 2016;24(10):1727-1735. doi:10.1016/j.joca.2016.05.002
  • Zacharias A, Green RA, Semciw A, English DJ, Kapakoulakis T, Pizzari T. Atrophy of hip abductor muscles is related to clinical severity in a hip osteoarthritis population. Clin Anat. 2018;31(4):507-513. doi:10.1002/ca.23064
ZONE 6

Calf

4 studies+
  • Hamilton MT, Hamilton DG, Zderic TW. A potent physiological method to magnify and sustain soleus oxidative metabolism improves glucose and lipid regulation. iScience. 2022;25(9):104869. doi:10.1016/j.isci.2022.104869
  • Hébert-Losier K, Wessman C, Alricsson M, Svantesson U. Updated reliability and normative values for the standing heel-rise test in healthy adults. Physiotherapy. 2017;103(4):446-452. doi:10.1016/j.physio.2017.03.002
  • Mian OS, et al. Soleus muscle architecture and function in healthy older adults. Exp Physiol. 2007.
  • Morse CI, Thom JM, Birch KM, Narici MV. Changes in triceps surae muscle architecture with sarcopenia. Acta Physiol Scand. 2005;183:291-298. doi:10.1111/j.1365-201X.2004.01404.x
WHOLE-BODY

General & Aging

5 studies+
  • Clark DJ, Fielding RA. Neuromuscular contributions to age-related weakness. J Gerontol A Biol Sci Med Sci. 2012;67(1):41-47. doi:10.1093/gerona/glr041
  • Crawford R, Gizzi L, Dieterich A, Ni Mhuiris Á, Falla D. Age-related changes in trunk muscle activity and spinal and lower limb kinematics during gait. PLoS One. 2018;13(11):e0206514. doi:10.1371/journal.pone.0206514
  • Narici MV, Maffulli N. Sarcopenia: characteristics, mechanisms and functional significance. Br Med Bull. 2010;95:139-159. doi:10.1093/bmb/ldq008
  • Pontzer H. Economy and endurance in human evolution. Curr Biol. 2017;27(12):R613-R621. doi:10.1016/j.cub.2017.05.031
  • Tardieu C, Demirhan O, Akbal E, et al. Modification of the locomotor system in habitually quadrupedal humans. J Anat. 2022;241(3):765-775. doi:10.1111/joa.13693
SOURCES ARE PEER-REVIEWED JOURNAL ARTICLES. LINKS OPEN TO THE PUBLISHER'S RECORD OR DOI RESOLVER.