Squat and Back Pain: What the Evidence Actually Says About the Deep Squat, Lumbar Loading, and Non-Specific Low Back Pain
Table of Contents
Key takeaways: Squat and Back Pain
• The deep squat is a common resting posture in some traditional populations, but direct evidence that the unloaded deep squat relieves or worsens low back pain is still lacking.
• Hip and ankle mobility influence squat depth and squat mechanics. Limited mobility may lead to compensatory movement patterns, but current evidence does not prove that these patterns cause back pain.
• People with chronic low back pain often demonstrate different squat movement strategies than pain-free individuals, although it remains unclear whether these differences are a cause or a consequence of pain.
• Current evidence does not support the claim that the deep squat “decompresses” the spine. Most intradiscal pressure studies compare sitting and standing rather than squatting.
• The strongest intervention evidence comes from supervised resistance training programs that include squats alongside other compound exercises. No high-quality studies have demonstrated that the squat alone treats non-specific chronic low back pain.
• Some patients report that the deep squat feels relieving, while others cannot comfortably access the position because of pain, stiffness, or reduced mobility.
• From a clinical perspective, the most practical approach is usually to avoid unnecessary fear of movement, modify activities when needed, and progress within symptom tolerance rather than automatically avoiding or prescribing squatting.
Introduction: Squat and Back Pain
The relationship between squatting and back pain is one of the most frequently misunderstood topics in musculoskeletal medicine. One of the most common questions I hear from patients with back pain is whether they are still allowed to squat, go to the gym, or continue exercising at all. Many also ask which sports, movements, or positions are safe, especially when back pain begins to interfere with everyday life.
In practice, patients are often exposed to two very different messages. One is that a painful back should be protected from loading altogether, and that exercises such as squats may worsen the problem. The other is that movement is always beneficial and that continuing to train is the answer regardless of symptoms. Neither framing is accurate. From a clinical perspective, the reality is usually more nuanced.
In my experience, the most important question is often not simply whether a person can squat, but why a particular movement provokes symptoms and under what circumstances. Some patients cannot squat comfortably because of pain. Others cannot reach a deep squat at all because of reduced hip, ankle, or overall mobility. That distinction matters. A painful squat, a stiff squat, and a technically poor loaded squat are not the same clinical problem.
What the evidence suggests is that the squat is a common human movement pattern, reduced squat depth can reflect meaningful mobility limitations, and loaded squatting as part of progressive resistance training may help selected patients with chronic non-specific low back pain. However, this depends on appropriate assessment of the patient’s pain pattern, movement capacity, mobility profile, and exercise technique.
This article reviews squat and back pain from three angles: the anthropological argument for the resting squat as a common human posture, the biomechanics of how limited hip and ankle mobility can contribute to lumbar compensation during squatting, and the intervention evidence for loaded squatting in non-specific chronic low back pain.
Why Squat and Back Pain Are Discussed Together: Setting the Frame
When clinicians discuss squat and back pain, they are usually conflating two distinct clinical questions. The first is whether the resting deep squat — an unloaded posture — has relevance to back pain through its effects on spinal loading and muscular activation. The second is whether the loaded barbell squat, used as a resistance training exercise, is safe and potentially therapeutic for patients with existing back pain.
Among my own patients with low back pain, and especially those with pain around the buttock or posterior hip region, some describe the deep squat as a surprisingly relieving position. They may not use biomechanical language, but they often describe it simply as a position where the back or buttock area feels less irritated. I interpret this as a useful clinical clue rather than as proof that the deep squat is a treatment in itself.
What is also noticeable in practice is that many of my patients cannot comfortably reach a true deep squat, even when they feel that the position might help. Reduced mobility in the ankles, hips, or sometimes the spine can limit access to the position before pain is even the main issue. The same limitation may also show up during loaded squats: the range of motion remains partial, the movement feels awkward, and the patient may struggle to find a technically comfortable squat pattern.
The Resting Squat Is a Common Human Position — What the Data Show
The most rigorous data on the resting squat as a common human posture comes from a 2020 study published in the Proceedings of the National Academy of Sciences, examining activity and rest patterns in the Hadza people of Tanzania — one of the few remaining hunter-gatherer communities [1]. The researchers found that Hadza adults spend approximately 18% — roughly 2 hours per day — of their nonambulatory time in squatting postures, with approximately two-thirds of that time in unassisted squatting. They also spend approximately 12.5% of nonambulatory time kneeling [1].
Crucially, the Hadza spend approximately the same total amount of sedentary time each day as people in industrialized societies — around 9 hours per day [1]. The difference is not the quantity of rest, but the postures in which that rest occurs. Using surface electromyography, the researchers found that lower limb muscle activity in squatting and assisted squatting postures rises to approximately 20–40% of walking values for some muscles [1]. Chair sitting produces substantially lower muscle activity.
The authors propose that human physiology likely evolved in a context that included substantial inactivity but with increased muscle activity during sedentary time — and that the modern chair-sitting posture represents a mismatch with that evolutionary context [1]. Whether or not one accepts the full evolutionary framing, the resting squat appears to have been a common human rest posture in traditional populations — and a patient who cannot achieve a comfortable resting squat has lost access to a movement pattern that is commonly observed in those populations.
Among my own patients, the ability to rest comfortably in a deep squat is less common than many people might assume. Some have lost access to the position because of stiffness, reduced mobility, pain, or a combination of these factors.
When I do see this ability, it is often in patients who have some athletic background or who have maintained good mobility through training, work, or lifestyle. I would not interpret that as meaning that everyone needs to achieve a perfect deep squat. Rather, it shows that the deep squat is not just a strength exercise or a gym movement; it is also a mobility-demanding resting posture.
How Mobility Deficits Influence Squat Mechanics
Research on squat mechanics supports the idea that hip and ankle mobility influence how a person squats. Kim and colleagues found that ankle dorsiflexion and hip flexion were associated with squat depth in healthy adults, and they noted that limited hip flexion may lead to greater trunk flexion as a compensatory strategy [2]. Posterior pelvic tilt at the bottom of the squat — often called “butt wink” — is another example of this interaction between mobility, pelvic position, and lumbar mechanics. It is multifactorial and should not be interpreted as automatically harmful, but excessive posterior pelvic tilt, particularly if it occurs before parallel depth, may increase lumbar loading or injury risk in some contexts [3].
However, this biomechanical evidence still does not answer the pain question directly. Direct evidence specifically linking the unloaded resting deep squat position itself to low back pain relief or exacerbation remains limited. One study suggests that people with chronic low back pain may use altered squat movement strategies compared with pain-free controls, but this does not prove that the altered squat pattern caused the pain [6]. It may also reflect a protective or compensatory strategy that developed because the person was already experiencing pain, stiffness, or uncertainty with movement [6]. Likewise, one biomechanical review described plausible mechanisms whereby limited hip or ankle mobility, excessive lumbar flexion, trunk inclination, and posterior pelvic tilt may influence lumbar loading during squatting, but these mechanisms should not be interpreted as direct evidence of pain causation [7].
Taken together, I would be cautious about claiming that the deep squat is a clearly established treatment for back pain, or that the squat position itself is a major determinant of back pain. What we can say is more limited. Anthropological data from the Hadza suggest that squatting can be a common human resting posture in traditional populations [1], but direct studies showing that the unloaded deep squat relieves or worsens low back pain are still lacking.
The evidence we do have is mostly indirect. People with chronic low back pain may show altered squat movement patterns [6], and reduced hip or ankle mobility can influence how a person squats [2]. However, this does not establish causality. We do not know whether altered squat mechanics contribute to pain, whether pain changes the way people squat, or whether both are shaped by other factors such as stiffness, fear of movement, training history, or general mobility. Likewise, biomechanical reviews have proposed plausible mechanisms whereby limited hip or ankle mobility, excessive trunk inclination, lumbar flexion, or posterior pelvic tilt may alter lumbar loading during squatting [7], but these mechanisms should not be interpreted as direct evidence of pain causation.
There is also a practical issue that is easy to overlook in research discussions. In my own clinical practice, many patients with back or buttock-region pain cannot comfortably reach a true deep squat in the first place. That makes the resting deep squat difficult to study as a simple intervention, because the position itself may already require a level of mobility that many symptomatic patients do not currently have. For that reason, I see the deep squat less as a universal prescription and more as a clinical observation: if a patient can access it and it feels relieving, that may be useful; if they cannot, that limitation may also tell us something about their movement capacity.
At the same time, some of my patients do describe the deep squat as a relieving position for low back or buttock-region discomfort. I can relate to this myself as well. During long clinical workdays, I sometimes use a deep squat briefly to ease tension around the lower back and gluteal region. This is not evidence that the position treats back pain, and it should not be presented as a general recommendation. It is simply a clinical and personal observation that, for some people, changing into a deep squat can feel like a useful way to vary posture and temporarily reduce tension. Unfortunately, based on the current research data, we still do not have a precise answer to how much this position helps, for whom it helps, or whether it has any meaningful therapeutic effect beyond short-term symptom relief.
Intradiscal Pressure, Sitting, and the Squat and Back Pain Narrative
A recurring claim in discussions about squat and back pain is that sitting compresses the lumbar spine far more than squatting, and therefore the deep squat is inherently “spine-decompressing.” This claim is worth examining carefully because the evidence does not fully support it.
A 2022 systematic review and meta-analysis by Li and colleagues, published in Life, pooled data from 7 studies comparing in vivo intradiscal pressure in sitting versus standing [4]. Overall, sitting induces a significantly higher intradiscal pressure on the lumbar spine than standing (standardized mean difference: 0.87; 95% CI = [0.33, 1.41]) [4]. This appears to support the conventional narrative.
However, in studies published after 1990 — which used more advanced transducer technology — there are no significant differences in intradiscal pressure between sitting and standing [4]. Furthermore, degenerated discs showed no difference in intradiscal pressure in sitting versus standing [4]. The authors conclude that regardless of which posture induces higher intradiscal pressure, any prolonged posture is not recommended [4].
The critical limitation for the squat and back pain discussion is that this review compares sitting and standing only — no in vivo intradiscal pressure data exist for the deep squat position in this meta-analysis. The argument that squatting “decompresses the spine” has no direct evidentiary support from this body of literature.
The more defensible framing is that the resting squat offers a postural alternative to prolonged sitting, involves different lower limb muscle activation patterns, and maintains hip and ankle mobility — all of which have plausible relevance to back pain management through mechanisms other than intradiscal pressure.
A general clinical principle I often discuss with patients is that posture should not be viewed as one perfect position to find and hold. In many cases, the more useful goal is to vary position frequently. Sitting, standing, lying down, walking, leaning, kneeling, or squatting may all have a place, depending on the person and the context. The key is not that one posture is always correct, but that the body is not forced to remain in the same position for too long.
From that perspective, the deep squat can be seen as one additional resting posture in the movement repertoire. It is not automatically better than sitting, and it is not a cure for back pain. But for patients who can access it comfortably, it may provide another way to change load, vary hip and spine position, and break up the monotony of prolonged sitting or standing.
Loaded Squat and Back Pain: What the Intervention Evidence Shows
The most relevant evidence for loaded squat and back pain management comes from resistance training intervention studies in non-specific chronic low back pain.
A mixed-methods feasibility study by Tjøsvoll and colleagues, published in BMC Sports Science, Medicine and Rehabilitation in 2020, enrolled 25 adults with persistent non-specific low back pain (pain ≥4 on NPRS, duration >3 months) in a 16-week supervised periodized resistance training program [5]. Participants trained a whole-body program consisting of squat, bench press, deadlift, and pendlay row two times per week for 16 weeks [5]. The independent contribution of the squat versus the other exercises cannot be determined from this study design.
The mean difference on the numeric pain rating scale in the last 2 weeks from baseline to 8 weeks was 2.6 (95% CI: 1.8–3.6), and from baseline to 16 weeks it was 3.4 (95% CI: 2.5–4.4) [5]. A minimum detectable change of 2 points is considered a clinically meaningful change on this scale (as applied in [5], referencing Childs et al. 2005), and both the 8-week and 16-week improvements exceeded this threshold. There were also improvements in pain-related disability (mean difference 3.9, 95% CI: 2.3–5.5), pain self-efficacy (7.7, 95% CI: 5.4–10.1), and muscle strength [5].
The program required a 4-week technical adaptation phase before heavier loading was introduced, and a physical therapist with powerlifting experience supervised every session [5]. Participants reported that supervision and technical feedback were important during progression [5]. Adverse events were minimal: one participant reported slight worsening of low back pain, and two experienced minor muscle strains managed through exercise modification [5]. In the qualitative focus group interviews, several participants reported improvements in sleep quality during the program [5].
This is feasibility-level evidence, not a randomized controlled trial, and the authors themselves call for an RCT to confirm efficacy [5]. It is clinically useful as proof-of-concept that a supervised, periodized compound resistance training program including squatting can be feasible and well-tolerated in this patient group, with clinically meaningful pain improvements. However, intervention evidence for the loaded barbell back squat as an isolated treatment for non-specific chronic low back pain remains indirect. Available studies have evaluated squatting as one component of broader resistance training programs rather than as a squat-only intervention compared with a control group [5].
So where does this leave the original patient question: “Can I squat with back pain, and will squatting help my back pain?” Unfortunately, the current evidence does not give a definitive yes-or-no answer. We know that resistance training in general can be useful for many patients with non-specific low back pain, but the specific effect of the squat itself is much harder to isolate.
In practice, my advice is usually more cautious and individualized. If a movement is tolerated and does not clearly worsen symptoms, it may often be continued or modified within pain-limited boundaries. At the same time, it may be sensible to be careful with heavy spinal loading, especially during a more painful or irritable phase. This does not mean that movement should be stopped altogether. For most patients, the better starting point is usually to keep moving, reduce or modify the most provocative loads, and gradually rebuild tolerance as symptoms allow.
I would be careful about telling a patient with back pain to immediately start heavy squatting as a treatment. That would be stronger than the current evidence supports. A more defensible message is that squatting may be part of a well-supervised resistance training approach for selected patients, but it is not a universal prescription and it is not a guaranteed solution for back pain.
Conclusion: Squat and Back Pain
Overall, the evidence suggests that the squat should be viewed as a useful movement pattern rather than a cure for back pain. Squatting appears to be a common resting posture in some traditional populations, but direct evidence that the unloaded deep squat relieves or worsens low back pain is still lacking.
Biomechanical studies show that hip and ankle mobility can influence squat depth, pelvic position, trunk flexion, and lumbar loading, but these findings do not prove that altered squat mechanics cause pain. Similarly, people with chronic low back pain may squat differently from pain-free controls, yet this may reflect compensation, protection, stiffness, or fear of movement rather than the original cause of symptoms.
For loaded squatting, the best available intervention evidence comes from broader supervised resistance training programs, not squat-only trials, so the independent therapeutic effect of the squat remains uncertain. In practice, I would not present the squat as either dangerous or curative.
Some patients may find the deep squat relieving, while others cannot access it because of pain or reduced mobility. The most reasonable approach is to assess the individual, modify the movement when needed, avoid unnecessary fear of loading, and progress within symptom tolerance.
References
[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC7132251/
[2] https://pmc.ncbi.nlm.nih.gov/articles/PMC4415844/
[3] https://doi.org/10.3390/app152312526
[4] https://pmc.ncbi.nlm.nih.gov/articles/PMC8950176/
[5] https://doi.org/10.1186/s13102-020-00181-0
[6] https://pubmed.ncbi.nlm.nih.gov/33775082/
[7] https://pmc.ncbi.nlm.nih.gov/articles/PMC10987311/
