Key Laboratory of Exercise and Health Sciences, Shanghai University of Sport, Shanghai, China.
PLoS One. 2023 Jun 2;18(6):e0286645. doi: 10.1371/journal.pone.0286645. eCollection 2023.
This study aimed to compare the intrinsic foot muscle (IFM) morphology and isometric strength among runners with habitual rearfoot strike (RFS) and non-rearfoot strike (NRFS) patterns. A total of 70 recreational male runners were included in this study (32 RFS and 38 NRFS), an ultrasound device and hand-held dynamometry were used to measure IFM morphology and isometric strength. Results indicated that the RFS runners had significantly thicker tibialis anterior (P = 0.01, ES = 0.64, 95% CI [0.01-0.07]) in IFMs morphology and higher Toe2345 flexion strength in IFMs strength (P = 0.04, ES = 0.50, 95% CI [0.01-0.27]) than NRFS runners, the cross-sectional area of flexor digitorum brevis was positively correlated with T2345 flexion strength (r = 0.33, p = 0.04), T12345 (r = 0.37, p = 0.02) and Doming (r = 0.36, p = 0.03) for runners with NRFS. IFMs morphology and isometric strength were associated with foot strike pattern, preliminary findings provide new perspectives for NRFS runners through the simple measurement of IFMs morphological characteristics predicting IFMs strength, future studies could adopt IFMs training to compensate the muscle strength defects and prevent foot-related injuries.
本研究旨在比较习惯性后足着地（RFS）和非后足着地（NRFS）跑步者的固有足部肌肉（IFM）形态和等长强度。本研究共纳入 70 名男性休闲跑步者（32 名 RFS 和 38 名 NRFS），使用超声设备和手持测力计测量 IFM 形态和等长强度。结果表明，RFS 跑步者的 IFM 形态中胫骨前肌明显更厚（P = 0.01，ES = 0.64，95%CI [0.01-0.07]），IFM 强度中脚趾 2345 弯曲强度更高（P = 0.04，ES = 0.50，95%CI [0.01-0.27]），NRFS 跑步者的比 RFS 跑步者的短屈肌横截面积与 T2345 弯曲强度（r = 0.33，p = 0.04）、T12345（r = 0.37，p = 0.02）和 Doming（r = 0.36，p = 0.03）呈正相关。IFM 形态和等长强度与足着地模式有关，初步研究结果为 NRFS 跑步者提供了新的视角，通过简单测量 IFM 形态特征来预测 IFM 强度，未来的研究可以采用 IFM 训练来弥补肌肉力量缺陷，预防与足部相关的损伤。
