截肢短跑运动员的腿部僵硬程度与短跑能力

Leg stiffness and sprint ability in amputee sprinters.

作者信息

Hobara Hiroaki, Tominaga Shuichi, Umezawa Shingo, Iwashita Koudai, Okino Atsuo, Saito Taku, Usui Fumio, Ogata Toru

机构信息

Research Institute, National Rehabilitation Center for Persons with Disabilities, Department of Rehabilitation for the Movement Functions, Namiki 4-1, Tokorozawa, Saitama, Japan.

出版信息

Prosthet Orthot Int. 2012 Sep;36(3):312-7. doi: 10.1177/0309364612442121.

DOI:10.1177/0309364612442121

PMID:22918908

Abstract

BACKGROUND

Understanding leg stiffness (K (leg)) in amputee sprinters is important for the evaluation of their sprint ability and development of running-specific prostheses (RSP).

OBJECTIVES

To investigate K (leg) during hopping in amputee sprinters.

STUDY DESIGN

Cross-sectional study.

METHODS

Seven transtibial (TT) and seven transfemoral (TF) amputee sprinters, as well as seven non-active able-bodied subjects, performed one-legged hopping matching metronome beats at 2.2 Hz. Amputees hopped on their sound limb whereas able-bodied (AB) subjects hopped on their dominant limb. Using a spring-mass model, K (leg) was calculated from the subjects' body mass, ground contact and flight times.

RESULTS

Both TT and TF sprinters demonstrated significantly higher K (leg) than AB subjects. K (leg) during hopping on the sound leg significantly correlated with personal records attained in a 100-m sprint in both TT (r = -0.757) and TF sprinters (r = -0.855).

CONCLUSION

The results of the present study suggest that amputee sprinters have a greater K (leg) during hopping than inactive non-amputees, and that their sprint ability can be predicted from the K (leg) during hopping at 2.2 Hz on the sound limb.

摘要