Why Clients Compensate During Pilates Exercises (And What Their Body Is Actually Telling You)
- theziblingsalipoon
- 3 days ago
- 13 min read
Every Pilates instructor has experienced it.
You ask a client to perform hip extension and their lower back arches.
You programme abdominal work and their hip flexors immediately take over.
You ask for shoulder flexion and their ribs flare.
You cue a squat and their knees collapse inward.
You teach a side-lying glute exercise and they somehow feel it entirely in their quadriceps.
The instinct is often to correct what we see.
“Tuck your pelvis.”
“Keep your ribs down.”
“Don’t let your knee roll in.”
“Relax your hip flexors.”
“Squeeze your glutes.”
Sometimes that works.
But when the same compensation appears repeatedly despite increasingly specific cueing, there is an important question instructors need to ask:
What if the client isn’t failing to understand the cue?
What if their body is simply finding the easiest available strategy to complete the task you have given it?
Compensation is not automatically bad movement.
Very often, it is information.
Understanding why compensations occur and learning how to change the exercise rather than endlessly correcting the client is one of the most valuable clinical reasoning skills a Pilates instructor can develop.
What Is A Movement Compensation?
A movement compensation occurs when the body uses an alternative movement strategy to complete a task.
Imagine asking a client to extend their hip while keeping their pelvis relatively stable.
Ideally, most of that movement occurs at the hip.
But if the client doesn’t have sufficient:
hip extension range
glute strength
pelvic control
trunk strength
coordination
they still need to find a way to move the leg backwards.
The body solves the problem.
Instead of producing all of the movement from the hip, it may increase lumbar extension and anterior pelvic tilt.
From the outside, the leg still travels backwards.
The exercise has technically been completed.
But the strategy used to create the movement has changed.
That is compensation.
Compensation Isn’t Automatically A Problem
This distinction is important.
The human body is incredibly adaptable.
We compensate constantly throughout everyday life.
No two people walk identically.
No two people squat identically.
No two shoulders move through exactly the same path when reaching overhead.
Movement variability is normal.
The goal of Pilates instruction should therefore not be to eliminate every deviation from an imagined perfect movement pattern.
The more useful question is:
Is this compensation preventing the exercise from achieving its intended goal, or is it creating unnecessary symptoms or load elsewhere?
If the answer is no, the variation may not require correction at all.
If the answer is yes, then we need to understand what is driving it.
That requires more than another cue.
Why Clients Compensate
There is rarely one universal reason.
Compensations can arise because of:
limited joint range
insufficient strength
poor load tolerance
fatigue
pain
previous injury
reduced proprioception
motor learning
exercise complexity
fear or apprehension
anatomical variation
inappropriate spring resistance
inappropriate lever length
insufficient stability
unfamiliarity with the exercise
Sometimes several of these factors are occurring simultaneously.
This is why simply labelling a client as having “poor form” tells us very little.
The compensation is what we can see.
The important part is understanding why it is happening.
Example 1: Lumbar Extension During Hip Extension
This is one of the most common compensations instructors encounter.
You ask a client to perform hip extension during:
bridging
scooter
standing leg work
prone hip extension
quadruped leg extension
Reformer pulling straps variations
and the lumbar spine extends significantly.
The immediate response is often:
“Keep your core engaged.”
“Tuck your pelvis.”
“Don’t arch your back.”
But why is the lumbar spine extending?
There are several possibilities.
The client may have limited available hip extension.
They may lack sufficient glute strength to produce the movement.
The resistance may be too heavy.
They may not yet understand how to dissociate hip movement from pelvic movement.
They may simply be attempting to achieve a larger range than their hip currently allows.
If hip extension stops at ten degrees but you continue asking the leg to travel backwards, the additional movement has to come from somewhere.
Often, it comes from the lumbar spine.
No amount of shouting “use your glutes” changes the available range at the hip.
A better solution may be to reduce the movement range and load the client effectively within the range they actually possess.
Example 2: Rib Flare During Shoulder Flexion
Another common compensation occurs when clients take their arms overhead.
As the shoulders move into flexion, the ribs lift and the lumbar spine extends.
Again, instructors often immediately cue:
“Ribs down.”
But rib flare can tell us something useful.
The client may have limited shoulder flexion.
They may have reduced thoracic extension capacity.
The latissimus dorsi may be limiting the available shoulder range.
They may lack the trunk control required to maintain their chosen position under load.
Or the load itself may simply be too heavy.
The body still wants the arms to travel overhead.
If the glenohumeral joint and scapula cannot provide sufficient range, movement may be borrowed from the thoracic and lumbar spine.
Instead of repeatedly pushing the ribs down, try reducing the arm range.
If the rib flare disappears immediately, you’ve learned something important.
The issue wasn’t necessarily that the client didn’t understand your cue.
The range you prescribed exceeded the range they could currently control.
Example 3: Hamstrings Dominating A Glute Exercise
“I only feel this in my hamstrings.”
Pilates instructors hear this constantly during bridges and hip extension exercises.
The immediate response is often to cue the client to squeeze their glutes harder.
But muscle recruitment is influenced by far more than conscious intention.
It is affected by:
joint position
lever length
load
range
foot position
pelvic position
fatigue
individual anatomy
previous movement experience
The hamstrings and gluteus maximus both contribute to hip extension.
If the exercise allows the hamstrings to produce the required force efficiently, the
nervous system may choose that strategy.
Rather than endlessly telling the client to “activate their glutes”, change the mechanics.
Adjust foot position.
Alter knee flexion.
Change the exercise.
Modify resistance.
Reduce range.
Then reassess.
Programming can change muscle demand far more effectively than shouting the name of the muscle.
Example 4: Hip Flexors Taking Over During Abdominal Work
Another familiar complaint:
“I can only feel this in my hip flexors.”
This commonly occurs during:
tabletop exercises
double-leg lowers
Hundreds
teaser preparations
long-lever abdominal work
feet-in-straps abdominal variations
The common explanation is that the client has “weak abs and tight hip flexors”.
Sometimes abdominal capacity is relevant.
But the mechanics deserve closer consideration.
When the legs are held in tabletop or extended away from the body, the hip flexors must
work.
That is part of the task.
The iliopsoas, rectus femoris and other hip flexors aren’t doing something wrong simply because the client can feel them.
The question is whether the overall demand exceeds the client’s ability to maintain the intended trunk position.
If the pelvis begins to anteriorly tilt or the lumbar spine moves into uncontrolled extension as the legs lower, the lever may simply be too demanding.
Instead of:
“Engage your core harder.”
Try:
bending the knees
reducing the leg-lowering range
working one leg at a time
changing spring resistance
reducing repetition volume
You have now changed the mechanical demand rather than relying solely on verbal correction.
Example 5: Knees Moving Inward During Squats And Lunges
“Knees out.”
It is one of the most common lower-limb cues in the fitness and Pilates industries.
But some degree of knee movement in the transverse and frontal planes is completely normal.
The knee is not designed to move exclusively forwards and backwards.
The issue becomes more relevant when movement is:
excessive
uncontrolled
associated with pain
significantly asymmetrical
preventing effective force production
A knee moving medially during a squat can have several contributors.
These may include:
hip strength
ankle mobility
foot mechanics
load
fatigue
balance
movement strategy
anatomical structure
Simply pushing the knees outward doesn’t tell you which one is relevant.
Try changing the task.
Reduce the load.
Change stance width.
Adjust foot position.
Provide external support.
Reduce depth.
Then observe what changes.
Every modification gives you additional information.
Load Is One Of The Biggest Drivers Of Compensation
This is one of the most useful concepts instructors can understand.
A client may demonstrate beautiful control during the first six repetitions and significant
compensation by repetition twelve.
Did they suddenly forget how to perform the exercise?
Probably not.
They became fatigued.
Their capacity to maintain the original strategy decreased, so their nervous system found another way to complete the task.
Likewise, a client may compensate immediately on a heavy spring and perform the exact same movement beautifully when the spring is reduced.
That is valuable information.
The problem wasn’t necessarily their motor control.
The load exceeded their current capacity.
This is why compensation should always be considered alongside:
resistance
volume
tempo
range
lever length
fatigue
Before adding another cue, look at the programme.
Range Of Motion Can Drive Compensation
Clients often assume more range equals better performance.
Instructors can unintentionally reinforce this by praising:
higher legs
deeper squats
larger circles
greater extension
bigger carriage movement
But if the additional range is being produced somewhere other than the joint you intended to train, you may simply be rewarding compensation.
Consider a prone hip extension exercise.
A client lifts their leg 20 centimetres.
It looks impressive.
But perhaps the first 10 centimetres come from the hip and the remaining movement is primarily lumbar extension and pelvic rotation.
Would performing a smaller movement with greater hip contribution better match the exercise goal?
Probably.
More movement isn’t automatically better movement.
Fatigue Changes Movement Strategy
Compensations that appear later in a set are particularly useful.
They tell you something about capacity.
Perhaps the client can maintain the desired movement for:
six repetitions
twenty seconds
one set
a certain spring resistance
After that, the strategy changes.
This gives you useful programming information.
Rather than repeatedly correcting them through another fifteen repetitions, you may simply have identified their current working capacity.
Stop the set.
Recover.
Then repeat.
This is far more purposeful than forcing someone to continue once the target movement has disappeared.
Pain Can Change Movement
Pain also influences movement strategy.
When something hurts, the nervous system may alter:
muscle recruitment
joint range
movement speed
weight distribution
coordination
This doesn’t necessarily mean the client has developed a permanent dysfunctional movement pattern.
The body may simply be protecting an irritated area.
If a client suddenly begins compensating during an exercise they normally perform
comfortably, ask whether anything feels different.
Do not assume every movement change needs immediate technical correction.
Sometimes symptoms have changed.
That requires a different response.
Anatomical Variation Matters
This is another area where instructors can become unnecessarily rigid.
Bodies are structurally different.
People have differences in:
femoral neck angle
acetabular orientation
tibial torsion
foot structure
spinal curvature
ribcage shape
limb length
shoulder morphology
This means there is no single aesthetically perfect squat, lunge or shoulder position that will suit every client.
Two clients can perform the same movement safely and effectively while looking noticeably different.
Trying to force every client into identical alignment can actually make movement less comfortable.
Anatomy matters.
Good instructors teach the person, not the textbook photograph.
Why More Cueing Doesn’t Always Produce Better Movement
When instructors see compensation, there is a temptation to keep adding information.
“Core on.”
“Pelvis neutral.”
“Shoulders down.”
“Ribs in.”
“Knees tracking.”
“Glutes on.”
“Don’t grip your hip flexors.”
Suddenly the client is trying to consciously control six different body parts simultaneously.
Movement becomes less automatic rather than more.
This is where programming and motor learning intersect.
Sometimes the best intervention isn’t another verbal cue.
It is changing the task so that the desired movement becomes easier to discover.
You might:
reduce resistance
increase resistance
shorten the lever
reduce range
change body position
provide external support
change spring tension
slow the tempo
simplify the movement
Then observe what happens.
Stop Correcting The Symptom Before Understanding The Cause
Imagine a client continually arches their lower back during an exercise.
You could spend the entire session correcting the arch.
Or you could ask:
When does the arch appear?
Does it happen when the leg lowers beyond a certain point?
Does it disappear when the knee bends?
Does it disappear with less spring resistance?
Does it appear only after eight repetitions?
Does it occur on one side but not the other?
Does it happen when the client is fatigued?
Each question gives you useful information.
Instead of simply identifying the compensation, you are beginning to understand the conditions under which it occurs.
That is clinical reasoning.
Use Regressions As An Assessment Tool
A regression isn’t simply an easier exercise.
It can also be an assessment.
If you shorten the lever and the compensation disappears, you’ve learned something.
If you reduce the spring and movement quality improves immediately, you’ve learned something.
If you increase stability and suddenly the client can perform the movement, you’ve learned something.
If you reduce range and the client can access the target musculature more effectively, you’ve learned something.
Every regression provides information about what is driving the movement strategy.
That makes regressions incredibly valuable programming tools.
And Use Progressions The Same Way
Progressions can reveal capacity limitations.
A client performs bilateral footwork beautifully.
You move to unilateral footwork and the pelvis rotates.
That doesn’t mean single-leg work is “bad” for them.
You’ve simply exposed a capacity they haven’t yet developed.
Now you have something to train.
The appropriate response may be to reduce spring resistance, decrease range or introduce supported unilateral work before progressing again.
A progression should reveal what needs to improve next.
It shouldn’t simply make an exercise look more impressive.
Compensation Versus Substitution
It can also be useful for instructors to distinguish between normal movement variability
and a substitution that changes the intended exercise significantly.
If your goal is isolated shoulder extension but the client generates most of the movement through trunk extension, the exercise may no longer be loading what you intended.
If your goal is hip abduction but the client rotates the pelvis substantially to achieve the range, the target stimulus may change.
This doesn’t mean the alternative movement is inherently dangerous.
It means it may not match your programme goal.
That is a far more useful framework than labelling movement as “good” or “bad”.
Ask:
Is the movement accomplishing what I programmed it to accomplish?
Better Questions For Pilates Instructors To Ask
When you see a compensation, don’t immediately correct it.
Ask:
What changes if I reduce the range?
What changes if I alter the load?
Does it appear immediately or only with fatigue?
Is the client experiencing pain?
Does changing body position alter the movement?
Is the client actually capable of the range I’m asking for?
Is this genuinely a problematic compensation or simply normal anatomical variation?
Does the compensation matter for the goal of this exercise?
Could I change the programme instead of adding another cue?
These questions create much better instructors than memorising another list of “correct” alignment cues.
Practical Programming Example: Glute Work
Imagine your client performs side-lying hip abduction but repeatedly rotates their pelvis backwards.
You could continually cue:
“Keep your hips stacked.”
But instead, investigate.
First, reduce the range.
Does the pelvis remain stable?
If yes, perhaps they were moving beyond their available hip abduction range.
Next, change the resistance.
Does the compensation disappear?
Perhaps the original load exceeded their current capacity.
Next, change the body position.
Would standing hip abduction or a supported Reformer variation allow them to load the glute more effectively?
Now you’re programming.
You’re no longer simply correcting.
Practical Programming Example: Abdominal Work
Your client performs a double-leg lower and their lumbar spine moves into significant extension halfway through the range.
Instead of repeatedly saying “core on”, try:
Reduce the leg-lowering range.
Bend the knees.
Move to alternating single-leg lowering.
Reduce the lever.
Reduce repetition volume.
Gradually rebuild the original exercise.
You’ve preserved the movement goal while matching the exercise to their current capacity.
Over time, the range can expand.
That is progression.
Practical Programming Example: Shoulder Work
A client performs arms in straps and elevates their shoulders as resistance increases.
Before telling them to “pull their shoulders down”, consider whether the spring is simply too heavy for the intended movement.
Reduce the resistance.
If the shoulder position changes immediately, you have identified an important variable.
You can now build strength progressively rather than asking the client to maintain an alignment they cannot currently sustain under the original load.
What Compensation Can Tell You About Your Programming
This is perhaps the most important shift.
When a client compensates, don’t only ask:
“What is the client doing wrong?”
Also ask:
“What might my programme be asking them to do that they cannot currently achieve?”
Maybe the load is inappropriate.
Maybe the range is excessive.
Maybe the exercise is too complex.
Maybe fatigue is too high.
Maybe the client hasn’t developed the prerequisite strength.
Maybe the spring setting is inappropriate.
Maybe the previous exercise already fatigued the muscle you are now expecting them to stabilise with.
Programming influences movement.
If the same compensation keeps appearing across your classes, it may be worth examining the programme before blaming the client’s technique.
The Goal Is Not Perfect Movement
Pilates instructors can become obsessed with creating visually perfect movement.
Perfectly square pelvis.
Perfectly neutral spine.
Perfectly parallel feet.
Perfectly level shoulders.
But humans aren’t symmetrical machines.
The goal should not be to make every client move identically.
The goal is to help clients develop:
strength
movement options
coordination
confidence
load tolerance
physical capacity
while respecting individual anatomy and symptoms.
Sometimes a movement variation genuinely needs intervention.
Sometimes it doesn’t.
Knowing the difference is where anatomy and biomechanics become incredibly important.
Key Teaching Takeaways
When you notice a client compensating during an exercise, remember:
Compensation is a movement strategy, not automatically a mistake.
Bodies compensate when the original task exceeds available mobility, strength, stability, coordination or load tolerance.
More cueing doesn’t necessarily solve a programming problem.
Load, range, lever length and fatigue should always be considered.
A compensation that appears late in a set can provide useful information about muscular capacity.
Anatomical variation means clients will not all move identically.
Regressions and progressions can be used as assessment tools.
Changing the exercise environment can sometimes improve movement faster than verbal cueing.
The question isn’t whether movement looks perfect. The question is whether it achieves the intended training goal.
Good instructors don’t simply identify compensations. They investigate why they are occurring.
The more you understand anatomy and biomechanics, the less dependent you become on memorised corrections.
You start seeing movement differently.
And once you understand what the body is telling you, your programming becomes far more purposeful.
Want To Understand Why Your Clients Move The Way They Do?
If you’ve ever found yourself repeatedly cueing the same correction without anything changing, the issue may not be your cueing.
You may need to understand the biomechanics behind the movement.
The Applied Anatomy & Biomechanics Certification through Body Form Education was created specifically for Pilates instructors who want to bridge the gap between knowing anatomy and actually applying it to real clients.
This isn’t another anatomy course built around memorising origins and insertions.
Inside the certification, we look at:
why clients compensate
what muscles should actually be working during common exercises
how joint position changes muscular demand
how load affects recruitment
how to recognise when a compensation actually matters
regressions and progressions
practical Mat and Reformer exercise breakdowns
how to manipulate exercises to target specific muscles
better cueing strategies
how anatomy and biomechanics should influence programming
The goal is to give you the reasoning skills to look at a client moving and understand what you are seeing, why it may be happening and what you can change next.
Learn more about the Applied Anatomy & Biomechanics Certification through Body Form Education.
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