I had a guy squat for me a few years back who looked right from every angle you’d normally check. The bar tracked straight, and he was hitting good depth on every rep, knees holding their line the whole set. Then I stepped behind him for his working set and watched his lower back take over where his hips should have been doing the work. His hip wasn’t rotating internally the way that squat needed, so his spine had been picking up that job for years, probably without him feeling a single rep of it.
Nobody catches that from the front. His last coach never had a reason to look, because the bar moved fine and the reps went up.
Most people think about training as a list of exercises: squat, press, pull, run. Those movements matter, but they’re built from something smaller that almost nobody trains on purpose. Underneath every exercise is a stack of joints handing force to each other, one after another, and how clean that handoff is decides how the whole thing holds up over years of reps.
What the Kinetic Chain Does
The kinetic chain is the path force takes through your body when you move. Push off the ground running and that force travels up through the ankle, the knee, the hip, and the spine before any of it turns into forward motion. A joint that can control force through its own range passes that force along and lets the next joint do its job. A joint that can’t do that hands its workload to whatever’s next door, and that neighbor keeps absorbing it until it finally has something to say about it.
A hip stuck in internal rotation sends extra motion into the low back. A stiff thoracic spine makes a shoulder do the work of an overhead press by itself. A dead ankle rewrites what the knee has to do on every step of a run, quietly, for years, long before anyone connects the eventual ache to the joint that caused it.
The Squat That Looks Right Rarely Is
Most compensation patterns pass a casual glance every single time. The pelvis tips a couple degrees at the bottom of a squat, so quietly that even the person doing it doesn’t feel it happen. A press asks for thoracic rotation that never comes, so the low back extends further than it should to make up the difference, and a shoulder ends up shrugging into work that should have come from somewhere else in the chain entirely.
The body is good at finishing a task. Finishing it well is a separate question, one the nervous system never bothers to ask. It wants the rep done, so it borrows whatever joints it needs to get there, and after enough reps, the borrowed pattern turns into the one that feels normal.
Segmentation Is the Skill Underneath It
The skill underneath all of this is segmentation, the ability to move one joint while the joints around it hold still. A hip that can rotate on its own, with the spine staying put, is doing that. So is a shoulder moving through its full range without a low back arching in to help it get there.
Most adults have lost a chunk of this without noticing it’s gone, because daily life doesn’t ask for it back. Sitting at a desk or driving a car doesn’t require isolated hip rotation, so the nervous system stops rehearsing it, and a skill that goes unrehearsed long enough gets hard to find again the moment you need it.
Controlled Articular Rotations are the tool I use most to rebuild it, and they sit at the center of Functional Range Conditioning. A CAR moves one joint through its full range while everything else holds still, and that’s a far harder task the first time someone tries it than it sounds on paper. The mechanics get a fuller treatment in our guide to Controlled Articular Rotations.
What segmentation buys a person is precision. The joint meant to move gets to move, and the ones that used to help out stop volunteering. Almost everyone skips this on the way to the exercises they care about, and it’s the piece that was doing the real work the whole time.
Where This Sits Under Strength Training
Nobody has to stop squatting, pressing, or deadlifting to do this work. Joint by joint training sits underneath the strength work, laying pipe before the water gets turned on.
A hip that rotates and can produce force at end range gives a squat or a lunge more to work with. Pressing builds real strength once a shoulder can move cleanly through its available range, without quietly loading a joint that was never built to take it that way. The ankle matters just as directly: real dorsiflexion changes how a knee tracks and how a foot absorbs the ground on every step of a run.
That improvement comes from raising what the joint itself can do before a heavy lift ever gets the chance to test it. This is part of why Functional Range Conditioning spends so much time strengthening a joint through its full available range, treating that range as something to build capacity in, not a passive stretch to sit in and hope it holds up later.
Joints Need Motion They’re Not Getting
There’s a maintenance case for this too, separate from performance. Joint tissue needs regular movement to stay healthy, and synovial fluid depends on that motion to circulate the way it’s supposed to. Cartilage responds to load moving through a full range, and most of us only ever ask it to handle a narrow slice of that in an average day. A joint that only sees ten percent of its available motion starts behaving like ten percent is all it has to give.
I can’t tell you exactly where that line sits for every joint in every person, because it moves with history, age, and what a joint has already been through. What years of testing people has shown me is that the joints nobody’s asked to move fully in a long time are almost always the stiffest ones on assessment, and stiffness without a clear injury behind it is usually a disuse problem before it’s anything else.
A Functional Range Assessment exists for exactly this. It goes joint by joint through the chain and tells you which ones aren’t carrying their share of the work.
Back to the Squat
The guy from that first squat needed his hip to do what a squat had always been asking of it. Once that came back, the bar path barely changed, but his lower back stopped doing a second job it was never built for.
One joint finally covering its own ground again took months of unglamorous reps, and from the outside it barely looked like anything.
Complex movement gets built out of pieces this small, and the pieces are where the real capacity comes from. Once you start training them on purpose, the exercises you already do start working the way you always figured they were working in the first place.
Written by
Brian Murray, FRA, FRSC
Founder of Motive Training
Motive Training is a coaching studio in South Austin built around assessment, joint health, and strength you can use. Train with us in the studio, come to a KINSTRETCH class, or work through the progressions in KINSTRETCH Online.