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  • 标题:Reproducibility and Validity of the Myotest for Measuring Step Frequency and Ground Contact Time in Recreational Runners
  • 作者:Vincent Gouttebarge ; Robin Wolfard ; Nouschka Griek
  • 期刊名称:Journal of Human Kinetics
  • 印刷版ISSN:1640-5544
  • 电子版ISSN:1899-7562
  • 出版年度:2015
  • 卷号:45
  • 期号:1
  • 页码:19-26
  • DOI:10.1515/hukin-2015-0003
  • 语种:English
  • 出版社:Walter de Gruyter GmbH
  • 摘要:The purpose of this study was to assess the reproducibility (test-retest reliability and agreement) and concurrent validity of the Myotest for measuring step frequency (SF) and ground contact time (GCT) in recreational runners. Based on a within-subjects design (test and retest), SF and GCT of 14 participants (11 males, 3 females) were measured at three different running speeds with the Myotest during two test sessions. SF and GCT were also assessed with a foot-mounted accelerometer (Gold Standard, previously validated by comparing to force plate data) during the first test session. Levels of test-retest reliability and concurrent validity were expressed with intraclass correlation coefficients (ICC), agreement with standard errors of measurement (SEM). For SF, test-retest reliability (ICC’s > 0.75) and agreement of the Myotest were considered as good at all running speeds. For GCT, test-retest reliability was found to be moderate at a running speed of 14 km/h and poor at speeds of 10 and 12 km/h (ICC < 0.50). Agreement of the Myotest for GCT at all three running speeds was considered not acceptable given the SEM’s calculated. Concurrent validity of the Myotest with the foot-mounted accelerometer (Gold Standard) at all three running speeds was found to be good for SF (ICC’s > 0.75) and moderate for GCT (0.50 < ICC’s < 0.75). The conclusion of our study is that estimates obtained with the Myotest are reproducible and valid for SF but not for GCT.
  • 关键词:agreement ; concurrent validity ; step frequency ; ground contact time
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