Fig. 2.

Representative MR images show the posterior horn of the medial meniscus overlaid with a–c T1rho and d–f T2 color maps at three different time points. Images a and d show color maps at baseline. The change in the colors indicates differences in the meniscal matrix and an increase in the water content after the marathon (b,e). Three months after the marathon persistent changes for T1rho are clearly displayed (c). T2 values decrease back to baseline after 3 months (f)