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Chronic diseases and allergies are risk factors predictive of a history of Medial Tibial Stress Syndrome (MTSS) in distance runners: SAFER study XXIV
Pieter-Henk Boer et al
The Physician and Sportsmedicine
Background
Medial Tibial Stress Syndrome (MTSS) is one of the most common causes of exercise-associated lower leg pain in distance runners.
Aim
To identify risk factors predictive of a history of MTSS in distance runners entering the Two Oceans Marathon races (21.1km and 56km).
Design
Cross-sectional study
Setting
2012 to 2015 Two Oceans Marathon races (21.1km and 56km).
Participants
Consenting race entrants
Methods
106 743 race entrants completed an online pre-race medical screening questionnaire. 76 654 consenting runners (71.8%) were studied. 558 verified MTSS injuries were reported in the previous 12 months. Risk factors predictive of a history of MTSS were explored using uni- & multivariate analyses: demographics (race distance, sex and age groups), training/racing history, history of chronic diseases, allergies and medication use.
Results
Independent risk factors predictive of a history of MTSS (adjusted for sex, age group and race distance) were a higher chronic disease composite score (PR=3.1 times increase risk for every two additional chronic diseases; p<0.0001), and a history of allergies (PR=1.9; p<0.0001). Chronic diseases (PR>2) predictive of a history of MTSS were: symptoms of CVD (PR=4.2; p<0.0001); GIT disease (PR=3.3; p<0.0001); kidney/bladder disease (PR=3.3; p<0.0001); nervous system/psychiatric disease (PR=3.2; p<0.0001); respiratory disease (PR=2.9; p<0.0001) a history of CVD (PR=2.9; p<0.0001); and risk factors of CVD (PR=2.4; p<0.0001) (univariate analysis). Average running speed was associated with higher risk of MTSS.
Conclusion
Novel independent risk factors predictive of a history of MTSS in distance runners (56km, 21.1km) were multiple chronic diseases and a history of allergies. Identifying athletes at higher risk for MTSS can guide healthcare professionals in their prevention and rehabilitation efforts.
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