Walking speed and spatiotemporal step mean measures are reliable during feedback-controlled treadmill walking; however, spatiotemporal step variability is not reliable

Casey Wiens, William Denton, Molly N. Schieber, Ryan Hartley, Vivien Marmelat, Sara A Myers, Jennifer M. Yentes

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The purpose of the study was to compare the effects of a feedback-controlled treadmill (FeedbackTM) to a traditional fixed-speed treadmill (FixedTM) on spatiotemporal gait means, variability, and dynamics. The study also examined inter-session reliability when using the FeedbackTM. Ten young adults walked on the FeedbackTM for a 5-minute familiarization followed by a 16-minute experimental trial. They returned within one week and completed a 5-minute familiarization followed by a 16-minute experimental trial each for FeedbackTM and FixedTM conditions. Mean walking speed and step time, length, width, and speed means and coefficient of variation were calculated from all experimental conditions. Step time, length, width, and speed gait dynamics were analyzed using detrended fluctuation analysis. Mean differences between experimental trials were determined using ANOVAs and reliability between FeedbackTM sessions was determined by intraclass correlation coefficient. No difference was found in mean walking speed nor spatiotemporal variables, with the exception of step width, between the experimental trials. All mean spatiotemporal variables demonstrated good to excellent reliability between sessions, while coefficient of variation was not reliable. Gait dynamics of step time, length, width, and speed were significantly more persistent during the FeedbackTM condition compared to FixedTM, especially step speed. However, gait dynamics demonstrated fair to poor reliability between FeedbackTM sessions. When walking on the FeedbackTM, users maintain a consistent set point, yet the gait dynamics around the mean are different when compared to walking on a FixedTM. In addition, spatiotemporal gait dynamics and variability may not be consistent across separate days when using the FeedbackTM.

Original languageEnglish (US)
Pages (from-to)221-226
Number of pages6
JournalJournal of Biomechanics
Volume83
DOIs
StatePublished - Jan 23 2019

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Exercise equipment
Walking
Feedback
Gait
Walking Speed
Young Adult
Analysis of Variance
Analysis of variance (ANOVA)

Keywords

  • Detrended fluctuation analysis
  • Feedback-controlled treadmill
  • Gait dynamics
  • Reliability
  • Self-paced treadmill

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

Cite this

Walking speed and spatiotemporal step mean measures are reliable during feedback-controlled treadmill walking; however, spatiotemporal step variability is not reliable. / Wiens, Casey; Denton, William; Schieber, Molly N.; Hartley, Ryan; Marmelat, Vivien; Myers, Sara A; Yentes, Jennifer M.

In: Journal of Biomechanics, Vol. 83, 23.01.2019, p. 221-226.

Research output: Contribution to journalArticle

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