Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
©Journal of Sports Science and Medicine (2023) 22, 166 - 174   DOI:

Research article
Reliability of Soft Tissue Vibration Measurement and Number of Steps Demanded during Treadmill Running
Qingshan Zhang1,2, , Christophe A Hautier2, Chloé Bonis2, Robin Trama3
Author Information
1 School of Athletic Performance, Shanghai University of Sport, Shanghai, China
2 Université de Lyon, UCBL1, Laboratoire Interuniversitaire de Biologie de la Motricité, EA 7424, Villeurbanne Cedex, France
3 University of Calgary, Faculty of Kinesiology, Human Performance Lab, Calgary, Alberta, Canada

Qingshan Zhang
✉ School of Athletic Performance, Shanghai University of Sport, Shanghai, China
Publish Date
Received: 30-01-2023
Accepted: 27-02-2023
Published (online): 01-03-2023
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The present study aims to determine the test-retest reliability of the input signal (INPUT) of foot impact and soft tissue vibration (STV) of the lower limb muscles during treadmill running. Twenty-six recreational runners participated in three running trials at constant velocity (10 km/h) within two days. The INPUT and STV of gastrocnemius medialis (GAS) and vastus lateralis (VL) were extracted from 100 steps measured by three triaxial accelerometers. The Intraclass Correlation Coefficient (ICC) was calculated to determine the Intra-trial and Inter-day reliability of the different variables. Intra-trial reliability results indicated that most of the INPUT and GAS STV parameters, except for damping coefficient and setting time, have good to excellent reliability (0.75 < ICC < 0.9) from the beginning of the run (10 steps) to the end. In contrast, only 4 VL STV parameters showed good reliability. Furthermore, inter-trial reliability measured on day one showed that the number of reliable parameters reduced, especially for VL STV, and more steps were required (20 < steps < 80) to achieve good reliability. Inter-day reliability results showed that only one VL STV parameter reached good reliability. Therefore, the present results show that the measurement of the foot impact and the calf muscle vibrations present a good to excellent reliability measured on a single trial and two trials carried out on the same day. The reliability of these parameters remains good when comparing two days of experimentation. We recommend measuring impact and STV parameters during treadmill running in the same session.

Key words: Soft tissue, vibration, reliability, treadmill running

           Key Points
  • The input signal parameters of foot impact revealed good to excellent reliability within different trials/days.
  • The gastrocnemius medialis indicated more parameters of soft tissue vibration in good reliability than the vastus lateralis, and the parameters of soft tissue vibration were reduced significantly within different days.
  • A minimal number of steps within different trials/days should be checked, permitting to reach a good reliability level of soft tissue vibration.
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