Next Article in Journal
Amplified Spontaneous Emission and Lasing in Lead Halide Perovskites: State of the Art and Perspectives
Next Article in Special Issue
Test-Retest Reliability of Kinematic Parameters of Timed Up and Go in People with Type 2 Diabetes
Previous Article in Journal
Spatio-Temporal Variability of Drought in Pakistan Using Standardized Precipitation Evapotranspiration Index
Previous Article in Special Issue
Patellofemoral Joint Loads during Running Immediately Changed by Shoes with Different Minimalist Indices: A Cross-sectional Study
Open AccessArticle

No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill

1
Department of Neuroscience and Movement Science, University of Fribourg, 1700 Fribourg, Switzerland
2
Istituto di Bioimmagini e Fisiologia Molecolare, CNR, 20090 Segrate (Milano), Italy
3
HumanTech Institute, University of Applied Sciences and Arts Western Switzerland, 1705 Fribourg, Switzerland
4
Istituto di Fisiologia Clinica, CNR, 20162 Milano, Italy
5
Université Grenoble-Alpes, LPNC, F-38000 Grenoble, France
6
Université de Lorraine, 2LPN-CEMA Group (Cognition-EMotion-Action), EA 7489, F-57070 Metz, France
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Appl. Sci. 2019, 9(21), 4589; https://doi.org/10.3390/app9214589
Received: 9 October 2019 / Revised: 22 October 2019 / Accepted: 24 October 2019 / Published: 29 October 2019
(This article belongs to the Special Issue Biomechanical Spectrum of Human Sport Performance)
We investigated how the presentation and the manipulation of an optical flow while running on a treadmill affect perceived locomotor speed (Experiment 1) and gait parameters (Experiment 2). In Experiment 1, 12 healthy participants were instructed to run at an imposed speed and to focus on their sensorimotor sensations to be able to reproduce this running speed later. After a pause, they had to retrieve the reference locomotor speed by manipulating the treadmill speed while being presented with different optical flow conditions, namely no optical flow or a matching/slower/faster optical flow. In Experiment 2, 20 healthy participants ran at a previously self-selected constant speed while being presented with different optical flow conditions (see Experiment 1). The results did not show any effect of the presence and manipulation of the optical flow either on perceived locomotor speed or on the biomechanics of treadmill running. Specifically, the ability to retrieve the reference locomotor speed was similar for all optical flow conditions. Manipulating the speed of the optical flow did not affect the spatiotemporal gait parameters and also failed to affect the treadmill running accommodation process. Nevertheless, the virtual reality conditions affected the heart rate of the participants but without affecting perceived effort. View Full-Text
Keywords: virtual reality; visual speed perception; treadmill running; self-motion perception; optical flow; locomotion; biomechanics virtual reality; visual speed perception; treadmill running; self-motion perception; optical flow; locomotion; biomechanics
Show Figures

Figure 1

MDPI and ACS Style

Caramenti, M.; Lafortuna, C.L.; Mugellini, E.; Abou Khaled, O.; Bresciani, J.-P.; Dubois, A. No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill. Appl. Sci. 2019, 9, 4589.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop