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Movement-based Locomotion
KTH, School of Electrical Engineering and Computer Science (EECS), Human Centered Technology, Media Technology and Interaction Design, MID.ORCID iD: 0009-0002-0080-3113
2025 (English)Doctoral thesis, comprehensive summary (Other academic)
Sustainable development
SDG 3: Good Health and Well-Being, SDG 9: Industry, innovation and infrastructure
Abstract [en]

The increasing prevalence of sedentary lifestyles has prompted a growing interest in technologies that integrate physical activity into digital experiences. This thesis focuses on how locomotion — the act of moving through physical and virtual environments — can be meaningfully integrated in applications through input from the user’s physical body movements. Through a Constructive Design Research approach, I have designed and prototyped locomotion techniques for Virtual Reality in four different projects, and conducted empirical evaluations through lab-based experimental studies to understand how this influences the user’s exertion, experience, and ability to navigate.

Each project explores different movement-based locomotion techniques for walking, jogging, rowing, and flying, culminating in four papers. Paper I demonstrates how a sedentary desktop activity can be redesigned to facilitate light to moderate intensity physical activity through walking. Papers II, III,and IV demonstrate how the prototypes provide means of movement-based locomotion in three-dimensional virtual environments beyond room scale, which is missing in exertion-focused games (exergames).

The results of the experimental studies provide additional insights into how the different design alternatives influenced the user’s ability to navigate, providing design implications for each context and for locomotion research more generally. Through reexamining the papers through the lens of fidelity -how accurate interactions correspond to real movements, the thesis addresses the question of how medium fidelity impacts the performance and experience of movement-based locomotion techniques. Additionally, the thesis addresses the question of how movement-based locomotion can provide means of exertion for both novel exergame design and non-exergame applications. Lastly, the thesis also offers a conceptual framework, intended as a support tool for both the design and analysis of movement-based interaction.

Abstract [sv]

Den ökande förekomsten av stillasittande livsstilar har lett till ett ökat intresse för teknologier som integrerar fysisk aktivitet i digitala upplevelser.

Denna avhandling fokuserar på hur lokomotion — förflyttning genom fysiska och virtuella miljöer — på ett meningsfullt sätt kan integreras i applikationer genom input från användarens kroppsrörelser. Genom konstruktiv designforskning (Constructive Design Research) har jag designat och prototyputvecklat lokomotionstekniker för Virtual Reality i fyra olika projekt, samt genomfört empiriska utvärderingar i laboratoriebaserade experimentella studier för att förstå hur detta påverkar användarens ansträngning, upplevelse och förmåga att navigera. Varje projekt utforskar olika rörelsebaserade lokomotionstekniker för gång, joggning, rodd och flygning, och resulterar i fyra artiklar. Artikel I visar hur en stillasittande skrivbordsaktivitet kan omformas för att möjliggöra måttliga mängder fysisk aktivitet genom gång. Artiklarna II, III och IV visar hur prototyperna tillhandahåller möjligheter för rörelsebaserad lokomotion i tredimensionella virtuella miljöer bortom rumsskala, vilket saknas i speldesign för fysiska träningsspel (exergames).

Resultaten från de experimentella studierna ger ytterligare insikter i hur de olika designalternativen påverkade användarens förmåga att navigera, och ger därmed designimplikationer för varje kontext och för forskning om lokomotion mer generellt. Genom att åter granska artiklarna utifrån perspektivet fidelity – hur väl interaktioner motsvarar verkliga rörelser – adresserar avhandlingen frågan om hur medelhög fidelity påverkar prestanda och upplevelse av rörelsebaserade lokomotionstekniker. Vidare behandlar avhandlingen frågan om hur rörelsebaserad lokomotion kan erbjuda former av ansträngning både för nya exergames och för icke-exergame-applikationer. Slutligen erbjuder avhandlingen även ett konceptuellt ramverk, avsett som ett stödverktyg för både design och analys av rörelsebaserad interaktion.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2025. , p. vii, 164
Series
TRITA-EECS-AVL ; 2025:87
Keywords [en]
Locomotion, Virtual Reality, Movement, Exertion, Exergame, Realism, Interaction Fidelity
National Category
Computer and Information Sciences
Research subject
Human-computer Interaction
Identifiers
URN: urn:nbn:se:kth:diva-371566ISBN: 978-91-8106-414-8 (print)OAI: oai:DiVA.org:kth-371566DiVA, id: diva2:2006212
Public defence
2025-10-31, https://kth-se.zoom.us/j/62907718395, F3, Lindstedtsvägen 26 & 28, Stockholm, 14:00 (English)
Opponent
Supervisors
Funder
StandUp, 66490
Note

QC 20251014

Available from: 2025-10-14 Created: 2025-10-13 Last updated: 2025-10-27Bibliographically approved
List of papers
1. BlocklyVR: Exploring Block-based Programming in Virtual Reality
Open this publication in new window or tab >>BlocklyVR: Exploring Block-based Programming in Virtual Reality
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2023 (English)In: Proceedings of MUM 2023 - The 22nd International Conference on Mobile and Ubiquitous Multimedia, Association for Computing Machinery (ACM) , 2023, p. 251-263Conference paper, Published paper (Refereed)
Abstract [en]

As programming is typically a static activity in front of a screen, we perform an initial exploration around the capabilities of block-based programming in the immersive space using Virtual Reality (VR) to make an early charting on how programming could involve moving the programmer's body. We created a block-based programming interface in a VR space called BlocklyVR based on the existing Blockly programming environment. To investigate programmer performance and experience in BlocklyVR, we conducted a controlled lab experiment (N = 20) with eight programming tasks that covered mathematical operations, if-statements, and function creation. Our initial exploration contributes by classifying movement types made by BlocklyVR programmers and reflecting on how these movements are related to the programming tasks. Additionally, our data suggests that participant performance in BlocklyVR was not affected compared to the 2D Blockly, even if participants were physically moving in VR space. We also found that the virtual reality sickness was marginal. Lastly, we identified four types of interaction that can potentially be employed by VR designers and developers aiming to convert a static task, like programming at a desk, into a "mobile"immersive experience.

Place, publisher, year, edition, pages
Association for Computing Machinery (ACM), 2023
Keywords
blockly, physical movement, programming, virtual reality
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:kth:diva-341678 (URN)10.1145/3626705.3627779 (DOI)2-s2.0-85180124461 (Scopus ID)
Conference
2nd International Conference on Mobile and Ubiquitous Multimedia, Proceedings of MUM 2023, Vienna, Austria, Dec 3 2023 - Dec 6 2023
Note

Part of ISBN 9798400709210

QC 20231229

Available from: 2023-12-29 Created: 2023-12-29 Last updated: 2025-10-13Bibliographically approved
2. Jogging-in-Place: Exploring Body-Steering Methods for Jogging in Virtual Environments
Open this publication in new window or tab >>Jogging-in-Place: Exploring Body-Steering Methods for Jogging in Virtual Environments
2023 (English)In: Proceedings of MUM 2023 - The 22nd International Conference on Mobile and Ubiquitous Multimedia, Association for Computing Machinery (ACM) , 2023, p. 371-379Conference paper, Published paper (Refereed)
Abstract [en]

Walk-in-Place is an established locomotion technique for walking in virtual environments, as it incorporates body motion similar to regular walking. Although there is extensive research on the performance and experience of walking in virtual reality spaces, it typically requires minimal-to-moderate physical movement, e.g., stepping forward and turning around, to explore virtual spaces. Therefore, the question we ask ourselves in this work is how user experience and performance are affected when the user is actively moving in place. In this paper, we explored three body-steering methods for jogging-in-place in virtual environments: (1) head-, (2) hand-, and (3) torso-based. To investigate the performance of the proposed body-steering methods for jogging in virtual reality, we conducted a controlled lab experiment (N = 12) to assess task completion time, number of steps, and VR sickness. We discovered that hand- and torso-based methods require fewer steps than the head-based method, and the torso-based is slower than the other two. Moreover, the number of collisions and virtual reality sickness were comparable among the methods.

Place, publisher, year, edition, pages
Association for Computing Machinery (ACM), 2023
Keywords
jogging, physical movement, steering, virtual reality
National Category
Human Computer Interaction
Identifiers
urn:nbn:se:kth:diva-341672 (URN)10.1145/3626705.3627778 (DOI)2-s2.0-85180131965 (Scopus ID)
Conference
2nd International Conference on Mobile and Ubiquitous Multimedia, Proceedings of MUM 2023, Vienna, Austria, Dec 3 2023 - Dec 6 2023
Note

Part of ISBN 9798400709210

QC 20231229

Available from: 2023-12-29 Created: 2023-12-29 Last updated: 2025-10-13Bibliographically approved
3. Rowing Beyond: Investigating Steering Methods for Rowing-based Locomotion in Virtual Environments
Open this publication in new window or tab >>Rowing Beyond: Investigating Steering Methods for Rowing-based Locomotion in Virtual Environments
2024 (English)In: CHI 2024 - Proceedings of the 2024 CHI Conference on Human Factors in Computing Sytems, Association for Computing Machinery , 2024, article id 631Conference paper, Published paper (Refereed)
Abstract [en]

Rowing has great potential in Virtual Reality (VR) exergames as it requires physical effort and uses physical motion to map the locomotion in a virtual space. However, rowing in VR is currently restricted to locomotion along one axis, leaving 2D and 3D locomotion out of the scope. To facilitate rowing-based locomotion, we implemented three steering techniques based on head, hands, and feet movements for 2D and 3D VR environments. To investigate these methods, we conducted a controlled experiment (N = 24) to assess the user performance, experience and VR sickness. We found that head steering leads to fast and precise steering in 2D and 3D, and hand steering is the most realistic. Feet steering had the largest performance difference between 2D and 3D but comparable precision to hands in 2D. Lastly, head steering is the least mentally demanding, and all methods had comparable VR sickness.

Place, publisher, year, edition, pages
Association for Computing Machinery, 2024
Keywords
exergame, locomotion, rowing, steering, virtual reality
National Category
Vehicle and Aerospace Engineering
Identifiers
urn:nbn:se:kth:diva-347649 (URN)10.1145/3613904.3642192 (DOI)001255317905035 ()2-s2.0-85194817975 (Scopus ID)
Conference
2024 CHI Conference on Human Factors in Computing Sytems, CHI 2024, Hybrid, May 11-16, 2024, Honolulu, United States of America
Note

Part of ISBN 979-840070330-0

QC 20241014

Available from: 2024-06-12 Created: 2024-06-12 Last updated: 2025-10-13Bibliographically approved
4. BroomBroom! Evaluation of Leaning and Controller-based Locomotion for Flying in Virtual Reality
Open this publication in new window or tab >>BroomBroom! Evaluation of Leaning and Controller-based Locomotion for Flying in Virtual Reality
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2025 (English)Manuscript (preprint) (Other academic)
Abstract [en]

Virtual Reality (VR) locomotion methods are mainly ground-based, room-scale, or discrete, making them ill-suited for flying experiences. Although leaning- and controller-based techniques are promising for flying in VR, we lack empirical evidence of their advantages. We compared combinations of leaning- and controller-based methods for steering and velocity in a user study (N = 24) using a broom metaphor to integrate these methods into an understandable locomotion reference. The steering methods were: 1) controller-pointing (CP) and 2) headset-leaning (HL); and for velocity control: 1) controller linear displacement (CLD) and 2) headset linear displacement (HLD). Results indicate that HL increase presence compared to CP. However, combining HL with CLD worsens coin collection rate, completion time, mental load, control factor ratings, and enjoyment. In contrast, HLD worked well when paired with either steering method. CP-CLD led to the highest coin collection rate and lowest mental load. All methods had comparable feelings of flying.

Keywords
Locomotion, Leaning, Controller, Embodied, Flying, Virtual Reality, Broom
National Category
Computer and Information Sciences
Research subject
Human-computer Interaction; Human-computer Interaction
Identifiers
urn:nbn:se:kth:diva-371591 (URN)
Conference
VRST '25
Note

Will be published as DOI 10.1145/3756884.3766017 in 31st ACM Symposium on Virtual Reality Software and Technology (VRST '25), Nov 12--14, 2025,  Montreal, QC, Canada

QC 20251014

Available from: 2025-10-14 Created: 2025-10-14 Last updated: 2025-10-14Bibliographically approved

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Hedlund, Martin

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