TABLE 1.

Premarathon and Postmarathon T2 Values for Each Cartilage Region of Interest and the Rate of Change^a

	T2 Value, Mean ± SD, ms
Region of Interest	Premarathon	Postmarathon	Change, %	P Value
Patellofemoral joint
Medial patella	31.8 ± 10.8	34.4 ± 10.2	8.2	< .0001
Lateral patella	32.0 ± 11.8	33.8 ± 11.1	5.6	.0001
Trochlea	33.2 ± 10.9	34.1 ± 11.3	5.8	.0011
Tibiofemoral joint
Medial tibial plateau	34.6 ± 12.0	35.6 ± 11.7	2.9	.0130
Lateral tibial plateau	34.9 ± 11.6	34.4 ± 11.7	–1.4	.1369
Medial femoral condyle	35.5 ± 11.7	35.2 ± 12.3	–0.8	.3309
Lateral femoral condyle	35.2 ± 11.7	35.9 ± 12.4	2.0	.0531

^aA P value less than .05 (given in boldface) indicates a statistically significant difference between the premarathon and postmarathon T2 values.