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01-12-2017 | Research | Uitgave 1/2017 Open Access

Journal of Foot and Ankle Research 1/2017

The effect of a running task on muscle shear elastic modulus of posterior lower leg

Tijdschrift:
Journal of Foot and Ankle Research > Uitgave 1/2017
Auteurs:
Shuhei Ohya, Masatoshi Nakamura, Takafumi Aoki, Daichi Suzuki, Takanori Kikumoto, Emi Nakamura, Wataru Ito, Ryo Hirabayashi, Tomoya Takabayashi, Mutsuaki Edama

Abstract

Background

Medial tibial stress syndrome (MTSS) is one of the most common causes of exercise-related leg pain in runners. Because stopping training due to pain from MTSS could decrease the athlete’s competitiveness, it is necessary to construct MTSS prevention and treatment programs. However, the effect of running, which is believed to cause MTSS, on shear elastic modulus of the posterior lower leg is unclear. Therefore, the purpose of this study was to investigate the effect of 30 min of running on shear elastic modulus of the posterior lower leg in healthy subjects.

Methods

Twenty healthy males volunteered to participate in this study (age, 20.9 ± 0.6 y; height, 169.6 ± 4.5 cm; weight, 62.6 ± 5.2 kg). The shear elastic modulus of the posterior lower leg was measured using ultrasonic shear wave elastography before and immediately after a 30-min running task.

Results

Shear elastic moduli of the flexor digitorum longus and tibialis posterior were significantly increased after 30 min running task. However, there were no significant changes in shear elastic moduli of the lateral gastrocnemius, medial gastrocnemius, peroneus longus and peroneus brevis.

Conclusion

The results suggested that the increases in shear elastic moduli of flexor digitorum longus and tibialis posterior after running could be a risk factor for running-related MTSS development.

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