Abstract
Almost nothing is known about the condition of the knee joints of multistage
ultra-marathon (MSUM) runner. This is first image-based investigation of the
femoropatellar joint (FPJ) using a mobile 1.5T MRI accompanying the MSUM
TransEurope Foot-Race (TEFR) 64 stages over 4486 km. Twenty-two (20
male) subjects got a knee MRI-protocol at defined measurement intervals during
TEFR: T2*-mapping (FLASH T2*-GRE), TIRM, and fat saturated PD
-sequence. In the FPJ 12 different regions were evaluated regarding cartilage
T2* and thickness changes and cartilage lesions in course of TEFR and a
test on possible compounding factors (running burden, BMI, age) was done if
being appropriate. No significant changes in cartilage thickness- and
T2*-values were found during TEFR. In 8 runners, at least one single
cartilage lesion (Grade 2–3) was found at baseline, but no significant
race-related adjacent T2*-changes or progress of the defects could be
detected. Analyses on compounding factors were negative. In knees with MPP (5)
significantly lower adjacent T2*-values were found. The extreme running
burden of a MSUM seems not to have a relevant negative influence on the FPJ
tissues, even if cartilage lesions are present.
Key word
cartilage - MRI - knee - marathon - running - patella