The arm swing rollator

An experimental redesign of the rollator for improved safety and ergonomics

Master thesis (2024)

Authors

P. van Boekel Industrial Design Engineering

Contributors

A.J. Jansen Emerging Materials - IDE (graduation committee member)
R. de Bruin Applied Ergonomics and Design - IDE (mentor)
Faculty
Industrial Design Engineering
More Info
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Published Date

06-12-2024

Language

English

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Faculty

Industrial Design Engineering

Abstract

This report documents the development and evaluation of the arm swing rollator, an innovative redesign aimed at improving the safety and ergonomics of traditional rollators. Current rollators often limit natural arm movements, which are essential for stability during walking. The arm swing rollator addresses this limitation by enabling users to swing their arms naturally, mimicking a more natural gait pattern.
The project began with a review of existing rollator designs and an exploration of ergonomic and safety challenges faced by users. Literature indicates that arm swing plays a significant role in enhancing gait stability, particularly in older adults. However, minimal research exists on how rollators impact gait. The arm swing rollator was conceptualized to bridge this gap and tested experimentally for its potential benefits.
A prototype of the arm swing rollator was developed, though time constraints led to compromises in its design. Friction in the mechanism and the use of 3D-printed load-bearing components limited the prototype's performance and safety, restricting testing to young, healthy participants. To approximate the balance challenges faced by elderly users, participants wore balance distortion platforms during the tests. Stability was measured using the mediolateral Lyapunov exponent, derived from video-tracked upper body movement.
The validation tests produced unexpected results. Neither the arm swing rollator nor the traditional rollator showed significant improvements in stability compared to walking without a rollator. Possible reasons for these findings include limitations in the test setup, measurement inaccuracies, and prototype shortcomings. Despite this, participant feedback highlighted a perceived improvement in posture and support when using the arm swing rollator.
The report concludes that the arm swing rollator represents an experimental step forward in rollator design but requires further refinement and testing. Recommendations include improving the prototype’s mechanism, ensuring safety for target users, and employing more accurate testing methods such as treadmill-based experiments and inertial measurement units. Future research could also explore additional rollator features to address user needs, such as enhanced braking systems, better terrain handling, and ergonomic resting solutions.
In summary, this project provides valuable insights into rollator design and testing, highlighting the potential for innovative walking aids to improve safety and quality of life for users. The findings underscore the need for continued research and development to fully realize the benefits of the arm swing rollator and similar concepts.