Application of T 2* mapping to evaluate the acute effects of different foot-strike patterns on knee cartilage after running in amateur marathon runners
10.3760/cma.j.cn112149-20230306-00163
- VernacularTitle:应用T 2* mapping评价不同落地模式对业余马拉松运动员跑步后膝关节软骨的急性影响
- Author:
Le WANG
1
;
Fanjing MENG
;
Jing ZHOU
;
Wanzhen YAO
;
Yanjing ZHANG
;
Siyu DAI
;
Junjie MAO
;
Yong CHEN
;
Jie LIU
;
Jianping DING
Author Information
1. 杭州师范大学附属医院放射科 杭州师范大学临床学院，杭州 310015
- Keywords:
Magnetic resonance imaging;
Marathon;
Foot-strike patterns;
Knee cartilage
- From:
Chinese Journal of Radiology
2023;57(12):1296-1304
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the acute effects of different foot-strike patterns of running on knee cartilage in amateur marathon runners using the T 2* mapping technique. Methods:From November 2021 to February 2022, 29 amateur marathon runners were recruited in Hangzhou. The gait analysis was performed to determine their landing patterns, then the runners were divided into the fore-foot strike (FFS) group (11 cases) and the rear-foot strike (RFS) group (18 cases). The MRI of the knee joint of the dominant leg was performed before and 30 min after running, and the volume, thickness, and T 2* value of each division of knee cartilage were measured. Independent samples t-tests were used to compare the differences in baseline data before running between the groups, and paired samples t-tests were used to compare the differences before and after running within the groups. Results:The difference in knee cartilage volume and thickness between the FFS and RFS groups before running was not statistically significant ( P>0.05), and the T 2* value of the femur medial posterior in the RFS group was higher than that of the FFS group ( t=-2.47, P=0.020). Compared with pre-running, cartilage thickness of the tibia lateral posterior decreased in the FFS group after running ( t=-2.96, P=0.016), and cartilage thickness of the tibia lateral posterior and patella lateral central decreased in the RFS group ( t=-3.25, -3.02, P=0.004, 0.007). Cartilage volume of the tibia lateral posterior decreased in the FFS group after running ( t=-2.58, P=0.030), and the cartilage volume of the patella lateral central decreased in the RFS group ( t=-2.74, P=0.013). The differences in T 2* values of cartilage in each region before and after running were not statistically significant in the FFS group ( P>0.05), whereas in the RFS group, the cartilage T 2* values in the femur medial posterior, femoral trochanter central, femoral trochanter lateral, femur lateral central, tibia lateral anterior, tibia medial posterior, tibia medial central, and tibia medial anterior decreased ( P<0.05). Conclusions:After running, FFS showed changes in morphology and biochemical composition only in some subregions of tibial cartilage, whereas most of the femoral cartilage, patellar cartilage, and tibial cartilage regions were altered by RFS. The RFS pattern introduces greater acute changes in cartilage in the knee joint.
