Stronger Muscles Tracked With Lower Type 2 Diabetes Risk at Every Genetic Risk Level

CATEGORY: METABOLIC & BLOOD SUGAR

Does an inherited tendency toward type 2 diabetes settle the matter? A UK study of 141,848 adults put that question to muscle strength. Adults in the strongest group were about 44% less likely to develop the disease than those in the weakest, and the connection showed up at every level of genetic risk.¹ In type 2 diabetes the body struggles to use insulin properly, so blood sugar runs too high.

Grip Tests, 138 Genetic Markers, Seven Years of Watching

The adults came from UK Biobank, a long-running health study, and none had diabetes at the start. Muscle strength was measured with a hand grip test, adjusted for lean body mass, then sorted into low, medium and high groups. Inherited risk got a score of its own, built from 138 DNA markers tied to type 2 diabetes. Over a median of about seven years, 4,743 people developed the disease. The researchers then compared how often it appeared across the strength groups and the genetic-risk groups.

2.47% Against 4.00% Over Eight Years

Compared with the weakest group, the strongest had roughly a 44% lower risk of developing type 2 diabetes. The connection held at every level of genetic risk. It was somewhat weaker at the top end. The estimated 8-year risk was 2.47% for people carrying high genetic risk alongside high muscle strength. For low and medium genetic risk paired with low strength, it was 2.89% and 4.00%.¹ Inherited risk did not have the last word in those comparisons.

Weak Muscle May Be an Early Symptom Rather Than a Cause

Muscle is where much of the sugar in your blood gets burned for fuel. Stronger, more active muscle tends to pull glucose out of the bloodstream more readily and respond better to insulin, the hormone that ushers sugar into cells. When muscle is weak or underused, sugar lingers. That is one reading of the finding. Another is that early, undiagnosed metabolic problems sap strength first, which would reverse the arrow entirely. Nobody here was assigned to be strong or weak, so the study cannot pull those apart. A 2023 review pooling a dozen cohort studies found grip strength judged relative to body size was consistently linked to lower type 2 diabetes risk, while raw grip strength alone showed only a weak link, with body fat carrying much of the connection.² An earlier pooled analysis of more than 1.7 million adults also tied higher muscular strength to lower risk after accounting for body fat, though more modestly.³

Key Takeaways

• Adults with the greatest muscle strength were about 44% less likely to develop type 2 diabetes than those with the least.
• The link appeared at every level of inherited risk, though it weakened among those carrying the highest genetic risk.
• People were followed rather than assigned, over about seven years, so the direction of cause remains open.

References

1. Wang M, Collings PJ, Jang H, et al. Prospective associations between muscle strength and genetic susceptibility to type 2 diabetes with incident type 2 diabetes: a UK Biobank study. BMC Medicine. 2025;23(1):93. link
2. Wu H, Gu Y, Wang X, et al. Association between handgrip strength and type 2 diabetes: a prospective cohort study and systematic review with meta-analysis. The Journals of Gerontology: Series A. 2023;78(8):1383–1391. link.
3. Tarp J, Støle AP, Blond K, et al. Cardiorespiratory fitness, muscular strength and risk of type 2 diabetes: a systematic review and meta-analysis. Diabetologia. 2019;62(7):1129–1142. link.