Influence of Running Shoe Longitudinal Bending Stiffness on Running Economy and Performance in Trained and National Level Runners

Author:

RODRIGO-CARRANZA VÍCTOR1,HOOGKAMER WOUTER2,SALINERO JUAN JOSÉ1,RODRÍGUEZ-BARBERO SERGIO1,GONZÁLEZ-RAVÉ JOSÉ MARÍA1,GONZÁLEZ-MOHÍNO FERNANDO

Affiliation:

1. Sport Training Lab. University of Castilla-La Mancha, Toledo, SPAIN

2. Integrative Locomotion Laboratory, Department of Kinesiology, University of Massachusetts, Amherst, MA

Abstract

ABSTRACT Introduction/purpose Previous results about shoe longitudinal bending stiffness (LBS) and running economy (RE) show high variability. This study aimed to assess the effects of shoes with increased LBS on RE and performance in trained and national runners. Methods Twenty-eight male runners were divided into two groups according to their 10-km performance times (trained, 38–45 min and national runners, <34 min). Subjects ran 2 × 3 min (at 9 and 13 km·h−1 for trained, and 13 and 17 km·h−1 for national runners) with an experimental shoe with carbon fiber plate to increase the LBS (Increased LBS) and a control shoe (without carbon fiber plate). We measured energy cost of running (W·kg−1) and spatiotemporal parameters in visit one and participants performed a 3000 m time trial (TT) in two successive visits. Results Increased LBS improved RE in the trained group at slow (11.41 ± 0.93 W·kg−1 vs 11.86 ± 0.93 W·kg−1) and fast velocity (15.89 ± 1.24 W·kg−1 vs 16.39 ± 1.24 W·kg−1) and only at the fast velocity in the national group (20.35 ± 1.45 W·kg−1 vs 20.78 ± 1.18 W·kg−1). The improvements in RE were accompanied by different changes in biomechanical variables between groups. There were a similar improvement in the 3000 m TT test in Increased LBS for trained (639 ± 59 vs 644 ± 61 s in control shoes) and national runners (569 ± 21 vs 574 ± 21 s in control shoes) with more constant pace in increased LBS compared with control shoes in both groups. Conclusions Increasing shoe LBS improved RE at slow and fast velocities in trained runners and only at fast velocity in national runners. However, the 3000 m TT test improved similarly in both levels of runners with increased LBS. The improvements in RE are accompanied by small modifications in running kinematics that could explain the difference between the different levels of runners.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Physical Therapy, Sports Therapy and Rehabilitation,Orthopedics and Sports Medicine

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