I’m not here to yuk your yum, but are we bending science to make Pilates seem like magic?

A large not-to-be-named Pilates industry regulation body has been trying to bolster the efficacy of “therapeutic Pilates” by highlighting research that illustrates the benefits of Pilates for common painful conditions from chronic low back pain to rotator related shoulder pain. I 100% applaud this well meaning effort to connect Pilates to how consistent movement can help with many painful conditions. But as I read the interpretations of the highlighted studies, which seem to be used to prop up this idea that Pilates is “magic” or somehow better at delivering people from their persistent painful conditions, I wonder if these folks are reading the studies? And if they are, I wonder how the heck they are concluding that Pilates is better than other forms of exercise. 

I’ll come out and say it immediately. I don't think Pilates is any better than any other form of exercise in addressing long term persistent pain in people. And I believe the research reflects this as well. But sometimes it feels like the Pilates industry is stuck on this idea that Pilates is somehow apart from general exercise. That it is somehow magic. That the way the springs and the straps and the exercise order and the breathing interact makes Pilates better for bridging the gap between physical therapy and returning to the normal activities of daily living, whatever those might be. But Pilates is just exercise. It is low load resistance training governed by the laws of physics and biology. And I fully understand that intersection does sometimes seem like magic but I think it’s important none-the-less to be careful with our interpretations of results from our own personal and professional Pilates experiences. Because when we zoom out, it’s probably less about magic than it is about simple, basic, boring explanations. 

So let’s look at a recent study, break down what it’s actually saying, and then go through some boring explanations why Pilates specifically is unlikely to have been the explanation for a reduction in perceived pain.

Paper: Impact of 8-Week Pilates Program on Lumbar Flexion–Relaxation Dynamics and Functional Outcomes in Women with Chronic Low Back Pain. Ferri-Caruana et al. 2026

Study design and methods (what the paper actually tested)

Design

• Controlled trial with two groups:
  
  
• Pilates exercise program (PEP)
  
  
• Control group
  
  
• Duration: 8 weeks
  
  

Participants

• Women with chronic low back pain (CLBP)
  
  

Main outcome measures

1. Pain
   
   
2. Functional capacity (LBOS)
   
   
3. Flexion–relaxation ratio (FRR) using surface EMG
   
   

FRR reflects the reduction in lumbar extensor muscle activity during full trunk flexion.

Lower relaxation (or asymmetry) is often interpreted as altered neuromuscular control in CLBP populations.

Analysis

Pre–post comparisons between groups.

Key results reported in the paper

The article reports:

• Pain reduction: ~30% improvement in Pilates group vs control
  
  
• Functional improvement: ~13.4% increase in LBOS
  
  
• FRR:
  
  
• No restoration of normal lumbar extensor relaxation
  
  
• Increased FRR asymmetry
  
  

The authors conclude:

Pilates improves pain and function but does not normalize lumbar extensor relaxation.
Increased asymmetry may represent compensatory or maladaptive redistribution.

Do the results match the data?

Pain and function

The conclusions here do match the reported data.

Reason:

• The study reports statistically significant changes in pain and LBOS relative to controls.
  
  
• The conclusion only claims improvement, not causality beyond the intervention.
  
  

This part is consistent with the dataset.

However:

• Without reporting effect size relative to minimal clinically important difference, the real clinical relevance is uncertain.
  
  

FRR findings

The authors conclude:

• Pilates did not restore FRR
  
  
• FRR asymmetry increased
  
  

This also appears to match the presented results, because the paper explicitly states:

• No normalization of lumbar extensor relaxation
  
  
• Increased asymmetry.
  
  

However, the interpretation is where issues arise.

The claim that asymmetry represents “compensatory or maladaptive redistribution” is speculative, because:

• No biomechanical or kinematic data were collected to support redistribution.
  
  
• EMG amplitude alone cannot identify compensation patterns.
  
  

So the results match the measurements, but the mechanistic interpretation exceeds the data.

EMG methodological limitations

Several issues affect interpretation of FRR findings.

1. Surface EMG cannot isolate deep lumbar muscles

Surface electrodes over lumbar extensors mainly detect:

• erector spinae
  
  
• multifidus (superficial portions)
  
  

But cannot isolate individual muscle contributions.

Cross-talk from adjacent muscles is common.

Implication:

Changes in FRR may reflect global extensor activity, not specific spinal stabilizer behavior.

2. FRR reliability is highly protocol dependent

Flexion-relaxation measures are sensitive to:

• trunk flexion speed
  
  
• pelvic motion
  
  
• electrode placement
  
  
• normalization procedures
  
  

If these variables are not tightly standardized, results may vary substantially.

The article does not appear to provide strong justification for signal normalization procedures, which are critical for comparing EMG across sessions.

3. EMG amplitude ≠ muscle force

EMG reflects electrical activity, not mechanical output.

Amplitude can change due to:

• electrode position
  
  
• skin impedance
  
  
• fatigue
  
  
• motor unit synchronization
  
  

Therefore increased asymmetry in EMG does not necessarily equal altered mechanical load distribution.

4. FRR interpretation in pain populations is controversial

FRR abnormalities are often observed in CLBP, but:

• They do not consistently normalize after symptom improvement.
  
  
• Pain reduction does not always correlate with EMG changes.
  
  

Thus the lack of FRR normalization does not contradict improvement in pain.

**Control group limitations**

The control group design significantly affects interpretation.

Passive control rather than active comparison

The study appears to use a non-exercise control condition.

This introduces several issues:

1. Placebo and expectation effects
   
   
2. Attention bias (intervention group receives instructor contact)
   
   
3. General exercise effect not controlled
   
   

Therefore the results show:

Pilates vs doing nothing

not

Pilates vs other exercise

So the study cannot determine whether improvements were due to:

• Pilates specifically
  
  
• Any physical activity
  
  
• Time or attention effects.
  
  

No blinding

Typical exercise trials cannot blind participants.

However:

• Outcome assessors ideally should be blinded.
  
  
• It is unclear whether EMG analysis was blinded.
  
  

This introduces risk of measurement bias.

Sample and statistical limitations

Although exact numbers vary depending on subgroup analyses, the study has typical small-sample issues:

Small sample size

Small samples increase:

• variance
  
  
• risk of Type I and II error
  
  
• instability of EMG measures
  
  

Short intervention

8 weeks is relatively short for neuromuscular adaptation.

Neural changes in motor control often require longer training exposure.

Overall methodological appraisal

Strengths

• Controlled trial
  
  
• Objective measurement (EMG)
  
  
• Clear pre/post comparison
  
  

Major limitations

1. Surface EMG limitations
   
   
2. Passive control group
   
   
3. Small sample size
   
   
4. Speculative interpretation of EMG changes
   
   
5. Short intervention duration
   
   

Bottom line

The study supports a modest conclusion: An 8-week Pilates program may reduce pain and improve function in women with chronic low back pain.

But the paper overinterprets the EMG findings, because:

• FRR changes cannot demonstrate compensation.
  
  
• Surface EMG cannot identify specific lumbar stabilization mechanisms.
  
  

Therefore:

Results ≠ mechanism claimed.

✅ Short verdict

• Pain/function findings: reasonable
  
  
• EMG interpretation: weak and speculative
  
  
• Control group design: limits causal conclusions
  
  

I totally get it. Reading papers and sifting through whether the methodology matches the conclusions is not everyone’s cup of tea. You have to either have the background knowledge about different methodological approaches and tools or be willing to learn, and honestly, we’re all pretty busy with the daily tasks of running a business. But if we’re gonna make the argument that Pilates is better than other forms of exercise we probably need the evidence to back up that claim. 

**Of note ⬇️

Claim: Pilates reduces pain in people with persistent low back pain. 

Result: Pain improved in the group that did Pilates

Nuance: The control group did nothing. So what the results actually imply is that exercise/movement reduced pain but we can’t really parse out whether it was specifically Pilates or just the general effect of exercise or something else entirely. To claim that it was Pilates specifically is a leap.

So let’s look at all of the boring reasons why it could have been something else entirely that helped these folks with pain reduction

Consistent exercise for 8 weeks 

There is a lot to be said for doing something consistently over time. The most broadly applicable solutions to the most vexing problems often come down to doing un sexy stuff really well. 

Power of expectation

The power of belief is quite real, as woo woo as it may sound. When we expect something will help, the intervention often shows better results than other interventions. And how many of your clients are referred to you because a friend or their doctor told them “Pilates cured my back pain” or “my Pilates instructor is magic” you have to see them. People expect Pilates will help and so it does

General effect of exercise

Low back pain has been researched more than any other painful condition and conclusions across the board generally find that one form of exercise is no better than another for pain relief and that reductions in pain when paired with movement are better than rest. 

Low load (re-)entry to movement

Pilates is a great environment to start movement in a low load environment and add small amounts of resistance over time. This can be a very non threatening way to begin to move again after a painful episode. The equipment allows the body to be supported in ways that are difficult to manufacture outside of Pilates, which is maybe why so many Physical Therapists have introduced a reformer, cadillac, or other studio equipment into their practice. However, this doesn't mean Pilates is the reason for success, it means that the environment we create through communication, knowledge about loading progressions, and sensitivity to client preference is the salient factor in client’s perception of pain. 

I honestly do think the equipment is kinda magic

Like I said, I’m not here to yuk your yum. I think Pilates is pretty amazing. I think there are some things that Pilates does really well…nervous system down regulation, body awareness, movement exploration, working the body against resistance in ways that are difficult to replicate elsewhere… but Pilates is no better than any other form of exercise when we’re looking at a broad population with different preferences and goals. Pilates might be the thing that helps someone re-integrate a movement practice into their lifestyle but it is not enough to build bone density or challenge cardiorespiratory fitness in meaningful ways that reduce all cause mortality.  

What really matters? What people will do consistently over time, what will make people fall in love with the power of movement so they will do it consistently FOR THE REST OF THEIR LIFE, and what will help them reach their goals. None of those things sit solely in the domain of Pilates.