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the claim
Habitual knuckle crackers are more likely to have hand swelling and lower grip strength.
the verdict
CONTESTED
contested - evenly split
Recorded sources
2 sources for · 2 against
Is it true that Habitual knuckle crackers are more likely to have hand swelling and lower grip strength?
Partly. Evidence regarding whether habitual knuckle cracking causes hand swelling and lower grip strength is mixed. While some studies suggest an association with reduced grip strength, more recent controlled evaluations report no significant differences in grip strength or swelling between crackers and non-crackers.
Verdict: CONTESTED · 2 sources for, 2 against · Last checked
The evidence we hold leans evenly split
How this was weighed
official record 3x · fact-check 2x · hedged 1x · crowd & reference 1x
- Effect of habitual knuckle cracking on hand function. · peer-reviewed · supports · weight 1.3 · 1990
- Prevalence of Hypermobility and Functional Hand Impairment D · peer-reviewed · supports · weight 1 · 2025
- "Knuckle Cracking": Can Blinded Observers Detect Changes wit · peer-reviewed · refutes · weight 1.05 · 2017
- Effects of habitual knuckle cracking on metacarpal cartilage · peer-reviewed · refutes · weight 1.05 · 2017
Evidence for · 2
An older study found that habitual knuckle crackers were more likely to have hand swelling and lower grip strength.
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J, C. & D, A. (1990). Effect of habitual knuckle cracking on hand function.. doi.org. https://doi.org/10.1136/ard.49.5.308
Evidence against · 2
A prospective study found no differences in grip strength and observed no hand swelling among habitual knuckle crackers.
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RD, B., AP, N., D, N., C, B., RM, S., M, C., B, F., WR, B., JA, S., & AJ, C. (2017). "Knuckle Cracking": Can Blinded Observers Detect Changes with Physical Examination and Sonography?. doi.org. https://doi.org/10.1007/s11999-016-5215-3
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More for · 1
A recent study reported weaker grip strength in the dominant hand of individuals who habitually crack their knuckles.
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Kanchan, S. & Meghana, R. (2025). Prevalence of Hypermobility and Functional Hand Impairment Due to Habitual Knuckle Cracking Among College Going Students in Bangalore. doi.org. https://doi.org/10.18311/jeoh/2025/48500
More against · 1
Controlled measurements found that habitual knuckle crackers had grip strength similar to non-crackers and showed no strength deficits.
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MT, Y., T, E., S, N., AD, T., H, G., N, U., M, K., & L, Ö. (2017). Effects of habitual knuckle cracking on metacarpal cartilage thickness and grip strength.. doi.org. https://doi.org/10.1016/j.hansur.2016.09.001
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