No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill
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 sens...
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doaj-61b3a260458b45ac84e743fb892028792020-11-24T21:56:44ZengMDPI AGApplied Sciences2076-34172019-10-01921458910.3390/app9214589app9214589No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a TreadmillMartina Caramenti0Claudio L. Lafortuna1Elena Mugellini2Omar Abou Khaled3Jean-Pierre Bresciani4Amandine Dubois5Department of Neuroscience and Movement Science, University of Fribourg, 1700 Fribourg, SwitzerlandIstituto di Fisiologia Clinica, CNR, 20162 Milano, ItalyHumanTech Institute, University of Applied Sciences and Arts Western Switzerland, 1705 Fribourg, SwitzerlandHumanTech Institute, University of Applied Sciences and Arts Western Switzerland, 1705 Fribourg, SwitzerlandDepartment of Neuroscience and Movement Science, University of Fribourg, 1700 Fribourg, SwitzerlandDepartment of Neuroscience and Movement Science, University of Fribourg, 1700 Fribourg, SwitzerlandWe 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.https://www.mdpi.com/2076-3417/9/21/4589virtual realityvisual speed perceptiontreadmill runningself-motion perceptionoptical flowlocomotionbiomechanics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Martina Caramenti Claudio L. Lafortuna Elena Mugellini Omar Abou Khaled Jean-Pierre Bresciani Amandine Dubois |
spellingShingle |
Martina Caramenti Claudio L. Lafortuna Elena Mugellini Omar Abou Khaled Jean-Pierre Bresciani Amandine Dubois No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill Applied Sciences virtual reality visual speed perception treadmill running self-motion perception optical flow locomotion biomechanics |
author_facet |
Martina Caramenti Claudio L. Lafortuna Elena Mugellini Omar Abou Khaled Jean-Pierre Bresciani Amandine Dubois |
author_sort |
Martina Caramenti |
title |
No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill |
title_short |
No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill |
title_full |
No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill |
title_fullStr |
No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill |
title_full_unstemmed |
No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill |
title_sort |
no evidence that frontal optical flow affects perceived locomotor speed and locomotor biomechanics when running on a treadmill |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2019-10-01 |
description |
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. |
topic |
virtual reality visual speed perception treadmill running self-motion perception optical flow locomotion biomechanics |
url |
https://www.mdpi.com/2076-3417/9/21/4589 |
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