A pooled analysis of the available evidence reveals that high levels of cholesterol are linked to a heightened risk of tendon abnormalities and pain.
Chronic low-level inflammation, prompted by cholesterol build-up in immune system cells, may have a key role, the findings suggested. Tendons are the tough fibers connecting muscles and bones in the body.
The researchers trawled six medical research databases, looking for studies investigating links between blood fats and tendon abnormalities/pain. Compared with people whose tendon structure was normal, those with abnormal tendon structure had a significantly more unfavorable blood fat (lipid) profile, the results showed.
Two of the three studies, which looked at Achilles tendon thickness, found that people with an unfavorable lipid profile had thicker tendons than those with lipid levels in the normal range. "Together, these findings provide significant support for a metabolic hypothesis of tendon injury and implicate lipid parameters as a potential link," the researchers noted.
The study was published online in the British Journal of Sports Medicine.