{"schemaVersion":1,"id":"en-pathway-movement-path","type":"pathway","pillar":"movement","locale":"en","translationGroupId":"pathway-movement-path","slugPath":"pathways/anatomy-of-a-movement","title":"Anatomy of a movement","shortTitle":"Anatomy of a movement","summary":"Six steps to break a movement down: the pattern it follows, the joints it moves, the muscles that produce and those that restrain, and what body proportions change about it.","level":"intermediate","estimatedMinutes":50,"synonyms":["movement patterns","biomechanics","breaking down a movement","squat hinge lunge","movement pathway"],"blocks":[{"id":"b1","type":"paragraph","content":[{"kind":"text","value":"A movement is rarely well described by its name. \"Squat\" covers a crouched position, a loaded exercise and a whole family of variants at once. What can be described is what the body does: which joints move, in which direction, and who produces the force."}]},{"id":"b2","type":"paragraph","content":[{"kind":"text","value":"This pathway follows that breakdown across the four most used patterns, then across two that pose a different problem."}]},{"id":"b3","type":"heading","level":2,"text":"What this pathway lets you understand","anchor":"what-this-pathway-lets-you-understand"},{"id":"b4","type":"paragraph","content":[{"kind":"text","value":"By the end, an unfamiliar movement should be classifiable. Three questions are enough: which joints close and open, which muscles cross those joints, and in which direction the load pulls."}]},{"id":"b5","type":"paragraph","content":[{"kind":"text","value":"It is a reading method, not a catalogue. Variants of one pattern follow by deduction rather than memorisation."}]},{"id":"b6","type":"heading","level":2,"text":"Level, prerequisites and reading time","anchor":"level-prerequisites-and-reading-time"},{"id":"b7","type":"paragraph","content":[{"kind":"text","value":"The "},{"kind":"link","value":"Locate and name","href":"/en/pathways/locate-and-name","external":false},{"kind":"text","value":" pathway is a useful but not compulsory prerequisite: it sets up the muscles and joints this one puts to work."}]},{"id":"b8","type":"paragraph","content":[{"kind":"text","value":"Allow around fifty minutes. Steps 5 and 6 are the densest."}]},{"id":"b9","type":"heading","level":2,"text":"The steps of the pathway","anchor":"the-steps-of-the-pathway"},{"id":"b10","type":"stepList","title":"The six steps, in order","steps":[{"id":"e1","title":"A symmetrical pattern","summary":"The squat: phases, joints, how work is shared, and three beliefs about depth and the knee.","targetId":"en-movement-squat","estimatedMinutes":8},{"id":"e2","title":"The same movement, shared differently","summary":"The hip hinge: the same posterior chain, but the knee moves little and the hip does most of the work.","targetId":"en-movement-hip-hinge","estimatedMinutes":8},{"id":"e3","title":"See the squat in motion","summary":"Squat biomechanics in pictures, with chapters and a transcript.","targetId":"en-video-squat-mechanics","estimatedMinutes":8},{"id":"e4","title":"When the base narrows","summary":"The lunge introduces a plane the other patterns barely load: sideways control of the pelvis.","targetId":"en-movement-lunge","estimatedMinutes":8},{"id":"e5","title":"When the load stops moving","summary":"The loaded carry: everything becomes holding, and it is the grip that gives out first.","targetId":"en-movement-loaded-carry","estimatedMinutes":7},{"id":"e6","title":"What makes the movement possible","summary":"The knee, the most loaded joint in this pathway and the least held by its own shape.","targetId":"en-anatomy-knee-joint","estimatedMinutes":9}]},{"id":"b11","type":"heading","level":2,"text":"What to take away","anchor":"what-to-take-away"},{"id":"b12","type":"paragraph","content":[{"kind":"text","value":"The patterns are not told apart by the muscles used — those overlap heavily — but by "},{"kind":"strong","value":"how work is shared between the joints"},{"kind":"text","value":". The squat splits between hip and knee; the hinge shifts towards the hip; the lunge adds a sideways constraint; the loaded carry removes the movement and keeps only the holding."}]},{"id":"b13","type":"evidence","level":"established","statement":"How stress is shared between the joints of the lower limb depends on the angle of flexion and on trunk position.","detail":"Work on squat biomechanics measures that shift between the patellofemoral joint and the tibiofemoral structures, and reference kinesiology supplies the mechanism. Published values depend on the protocol, the load and the population studied; they describe a trend, not any particular execution.","referenceIds":["escamilla2001","schoenfeld2010squat","neumann2016"]},{"id":"b14","type":"paragraph","content":[{"kind":"text","value":"Second point: body proportions change what is reachable, without that reflecting quality of execution. The relative length of the segments and the orientation of the hip socket move the bony limit from person to person. Squat depth is therefore not a transferable criterion."}]},{"id":"b15","type":"evidence","level":"probable","statement":"The muscles framing the spine take part in transmitting force between the limbs.","detail":"The review on core training describes that role and distinguishes endurance from maximal strength. It does not separately measure the trunk's contribution in each movement pattern, and turning it into conduct for a given person goes beyond what it establishes.","referenceIds":["mcgill2010"]},{"id":"b16","type":"callout","tone":"insight","title":"The thread to keep","content":[[{"kind":"text","value":"Three questions file any movement. Which joints move, and in which direction? Which muscles cross them? Where does the load pull relative to them?"}],[{"kind":"text","value":"Answering those three is enough to predict who works, without memorising a list of exercises."}]]},{"id":"b17","type":"heading","level":2,"text":"Checking what stuck","anchor":"checking-what-stuck"},{"id":"b18","type":"quiz","title":"Check my understanding","questions":[{"id":"q1","prompt":"What mainly distinguishes the squat from the hip hinge?","choices":[{"id":"q1c1","label":"How work is shared between hip and knee","correct":true,"explanation":"Both use the posterior chain; the hinge shifts the load towards the hip and leaves the knee only slightly bent."},{"id":"q1c2","label":"The muscles involved, which are different","correct":false,"explanation":"They overlap heavily. What changes is the share taken by each joint."},{"id":"q1c3","label":"The load used","correct":false,"explanation":"Load is not what defines a movement pattern."}]},{"id":"q2","prompt":"Why does the lunge demand something the squat does not?","choices":[{"id":"q2c1","label":"Control of the pelvis in the frontal plane","correct":true,"explanation":"The narrow base makes the pelvis drop on the free side; sideways control becomes a constraint in its own right."},{"id":"q2c2","label":"More force from the quadriceps","correct":false,"explanation":"The front leg works harder, but that is not the difference in kind."},{"id":"q2c3","label":"A greater ankle range","correct":false,"explanation":"Ankle range matters in both patterns."}]},{"id":"q3","prompt":"In a loaded carry, what usually gives out first?","choices":[{"id":"q3c1","label":"The grip","correct":true,"explanation":"The finger flexors have shorter endurance in a held contraction than the large muscle groups."},{"id":"q3c2","label":"The erector spinae","correct":false,"explanation":"They work in holding, but rarely to the point of forcing a stop before the hand does."},{"id":"q3c3","label":"The calves","correct":false,"explanation":"They take part in walking without being the limiting factor of the movement."}]}]},{"id":"b19","type":"heading","level":2,"text":"Sources","anchor":"sources"},{"id":"b20","type":"sourceList","title":"Sources for this pathway","referenceIds":["neumann2016","escamilla2001","schoenfeld2010squat","mcgill2010"]},{"id":"b21","type":"relatedContent","title":"Read next","targetIds":["en-pathway-muscle-growth-path","en-movement-vertical-push","en-anatomy-hip-joint"]},{"id":"b22","type":"shapierAction","actionId":"exercises-squat","label":"See the squat exercise and its execution","description":"The squat's execution, setup and cues live in Shapier; Body Lab only explains what happens during the movement.","webTarget":"https://shapier.app/en/exercises/squat","appTarget":"shapier://exercises/squat"}],"relations":[{"type":"prerequisite","targetId":"en-pathway-body-map-path"},{"type":"next-step","targetId":"en-pathway-muscle-growth-path"},{"type":"explains","targetId":"en-movement-squat"},{"type":"shapier-action","targetId":"exercises-by-movement"}],"authors":["equipe-editoriale-shapier"],"reviewers":["Thanh Chau"],"references":[{"id":"neumann2016","authors":"Neumann DA","year":2016,"title":"Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation, 3rd edition","source":"Elsevier","kind":"book","url":"https://shop.elsevier.com/books/kinesiology-of-the-musculoskeletal-system/neumann/978-0-323-28753-1"},{"id":"escamilla2001","authors":"Escamilla RF","year":2001,"title":"Knee biomechanics of the dynamic squat exercise","source":"Medicine and Science in Sports and Exercise","kind":"journal-article","doi":"10.1097/00005768-200101000-00020"},{"id":"schoenfeld2010squat","authors":"Schoenfeld BJ","year":2010,"title":"Squatting kinematics and kinetics and their application to exercise performance","source":"Journal of Strength and Conditioning Research","kind":"review","doi":"10.1519/jsc.0b013e3181bac2d7"},{"id":"mcgill2010","authors":"McGill SM","year":2010,"title":"Core training: evidence translating to better performance and injury prevention","source":"Strength and Conditioning Journal","kind":"review","doi":"10.1519/ssc.0b013e3181df4521"}],"review":{"publishedAt":"2026-08-02","reviewedAt":"2026-08-02","reviewDueAt":"2027-08-02","evidenceLevel":"established"},"limitations":["The descriptions apply to movements with vertical load at controlled speed: a jumping, very fast or strongly asymmetrical movement distributes the loads differently.","No step judges an execution: the pathway explains what happens, it does not say how to do it or what should be corrected.","The biomechanical values quoted come from laboratory protocols on small numbers of people, whose transfer to real training remains approximate."],"seo":{"title":"Anatomy of a movement — a guided pathway to breaking a movement down","description":"A six-step pathway: movement pattern, joints moved, prime movers and stabilisers, the effect of body proportions, and a closing quiz.","canonicalPath":"/en/pathways/anatomy-of-a-movement","image":"/og/en/pathway-movement-path.png"},"app":{"offlineEligible":true},"version":1}