§ Claim under review · Mixed
"Your hips aren't getting stiff because you're aging—they're getting stiff because you stopped squatting... Just 1 minute a day can help: Improve hip mobility, Relieve spinal compression, Increase ankle flexibility, Enhance overall movement and posture. Research published in the Journal of Physical Therapy Science suggests that regular deep squatting can improve joint range of motion and reduce stress on the lower back."
Verdict
Source exists but framing is misleading
Confidence
MediumSummary
This post cites a real journal, but the research does not say what the post claims. The Journal of Physical Therapy Science did publish a study on deep squats, but it simply measured whether people with more hip and ankle flexibility could squat deeper. It did not train anyone to squat and did not show that squatting improves your range of motion. The causal arrow is likely reversed. The "one minute a day" figure does not come from any study I could find. The claim that squatting relieves spinal compression runs against the biomechanical evidence, which shows squatting loads the spinal discs rather than decompressing them, and the cited squat study said nothing about the lower back. It is also not true that aging plays no role in stiffness, though disuse does matter and research on the Hadza people in Tanzania genuinely shows they rest in deep squats for hours a day. Spending time in a deep squat is reasonable, low risk, and free for most healthy people, but it has not been shown to do what this post says at the dose it specifies, and people with hip, knee, or back conditions should not treat it as universally safe.
The readings
key figures from the evidenceclaimed daily deep squat dose in viral post
decline in hip extension range of motion, oldest vs youngest
average Hadza sit-to-stand transitions per day
Why this verdict
Evidence
The Journal of Physical Therapy Science is a real, peer-reviewed journal, and it has published a real paper on deep squats. However, that paper is not what the post describes. Endo et al. (2020) state their purpose as examining "the relationship between the maximum squat depth and the range of motion of the ankle, knee, and hip joints, and the knee and hip muscle strength." This is a cross-sectional correlational study. It measured whether people with more joint range of motion could squat deeper. It did not train anyone to squat and did not measure whether squatting increases range of motion over time. The causal direction in the viral post is the reverse of what the study design can support.
The second JPTS paper commonly pulled into these posts concluded that "the performance of hip exercises by chronic low-back pain patients with lumbar instability is more effective than conventional therapy at reducing low-back pain and levels of disability." That study was about a hip exercise program in a clinical low-back-pain population, not about holding a deep squat for one minute a day in the general population.
On spinal loading, the available biomechanical evidence points the other way. Yanagisawa et al. found that after squat exercise, apparent diffusion coefficient values in the L4/5 and L5/S1 discs decreased, which is consistent with disc loading, not decompression. Squatting is an axially loaded position. No retrieved source demonstrates that a deep squat hold decompresses the spine.
The evolutionary framing has a real research basis, but it is about something else. Research on the Hadza in Tanzania found they spend roughly two hours a day resting in deep squats and average about 37 sit-to-stand transitions per day, and that squatting involves more muscle activity than chair sitting. Researchers proposed these "active rest postures" may reduce harms of inactivity. That work is about metabolic and cardiovascular consequences of sedentary time. It is not evidence that one minute of daily squatting improves hip range of motion.
On aging, Roach and Miles found that with the possible exception of hip extension, age-related differences in hip and knee active range of motion were relatively modest, with only hip extension declining more than 20 percent between the youngest and oldest groups. This partially undercuts the idea that stiffness is simply inevitable aging, but it does not establish that aging plays no role.
Findings
✓ What's accurate 7
- The Journal of Physical Therapy Science exists and has published research on deep squats.
- There is a genuine, measurable relationship between hip and ankle range of motion and the ability to perform a deep squat (Endo et al.).
- Ankle dorsiflexion and hip flexion mobility are real limiting factors in squat depth, and this is well established across the biomechanics literature retrieved.
- Deep resting squats are a common human resting posture in some populations, and Hadza research documents substantial daily time in that position.
- Deep squatting requires greater joint range of motion at hip, knee, and ankle than shallow squatting.
- Disuse contributes to loss of mobility. The claim that stiffness is purely an aging inevitability is itself too simple, and Roach and Miles offers partial support for that skepticism.
- The intervention is low risk for most healthy people and requires no equipment.
≈ What's misleading 9
- Unsupported causal inference: the cited study measured an association between existing joint mobility and squat depth. The post converts this into "squatting improves range of motion." Correlation presented as causation, with the causal arrow arguably running the other way.
- Fabricated or unsourced dose: "just 1 minute a day" appears in no retrieved study. A specific, memorable number has been attached to research that never tested it.
- Claim not present in the source: "reduce stress on the lower back" is not a finding of the JPTS deep squat paper. The only JPTS low-back paper found concerned a hip exercise program in a clinical pain population, which is a different intervention and a different population.
- Contradicted mechanism: "relieve spinal compression" runs against the retrieved biomechanical evidence, which shows squatting loads lumbar discs. No source found supports squatting as spinal decompression.
- False dichotomy: framing stiffness as caused by disuse and not by aging. Both contribute. Cartilage change, connective tissue change, and comorbidity are documented age-associated factors in the ROM literature retrieved.
- Teleological framing: "the human body was designed to perform" and "move the way your body was meant to." Evolutionary biology does not support design language, and posture norms vary substantially across cultures and eras.
- Marketing as evidence: downstream articles in this genre attribute claims to "Research from Hinge Health," a commercial company, rather than to an identifiable study.
- Overreach on outcomes: "enhance overall movement and posture" is broad and untested at this dose. No retrieved evidence links one minute of daily squatting to posture outcomes.
- Omitted contraindications: deep squats impose large hip joint stress and are relevant to people with femoroacetabular impingement, knee pathology, or hip replacement. The post presents it as universally appropriate.
? What's uncertain 5
- The exact sample size, population, and effect sizes in Endo et al. 2020 were not retrieved. Only the design and stated purpose were confirmed.
- Whether the poster intended the Endo paper at all cannot be established, because no author, year, or title is given. It is possible a different JPTS paper was intended, though no better-matching paper was found.
- Whether a short daily deep squat hold produces meaningful long-term hip mobility gains is genuinely untested at this dose in the sources retrieved. This is "not demonstrated," not "disproven."
- The relative contribution of aging versus disuse to hip stiffness in any individual is not resolvable from the retrieved evidence.
- I was unable to complete searches on stretching dose-response literature and on deep squat hold intervention trials due to a tool limit, so the absence of a supporting trial is provisional rather than exhaustive.
Sources
5 of 6 linked to recordsEndo Y, Miura M, Sakamoto M. "The relationship between the deep squat movement and the hip, knee and ankle range of motion and muscle strength." J Phys Ther Sci. 2020;32(6):391-394. PMID 32581431. Primary, peer-reviewed. https://pubmed.ncbi.nlm.nih.gov/32581431/ (This is the JPTS paper on deep squats that virtually all viral posts of this genre cite.)
Kim et al. "Effects of hip exercises for chronic low-back pain patients with lumbar instability." J Phys Ther Sci. 2015;27(2). Primary, peer-reviewed. https://www.jstage.jst.go.jp/article/jpts/27/2/27_jpts-2014-418/_article (The other JPTS paper commonly cited in these posts, via the low-back element.)
Yanagisawa et al. "Acute effects of varying squat depths on lumbar intervertebral disks during high-load barbell back squat." Scand J Med Sci Sports. 2021;31. Primary, peer-reviewed. https://onlinelibrary.wiley.com/doi/abs/10.1111/sms.13850
Raichlen et al., Hadza resting posture research (squatting/kneeling vs sitting), covered by USC, BBC Science Focus, CBC. Primary study reported through quality secondary coverage. https://today.usc.edu/squatting-or-kneeling-may-be-beneficial-for-health/
Roach KE, Miles TP. "Normal hip and knee active range of motion: the relationship to age." PMID 1881956. Primary. https://pubmed.ncbi.nlm.nih.gov/1881956/
"Just One Minute of Deep Squats Daily Reverses Years of Desk Job Damage." BoxLife Magazine. Tertiary content-farm article, no primary citation, attributes claims to "Research from Hinge Health," a company. https://boxlifemagazine.com/daily-deep-squats-restore-hip-mobility/