Liu, Zekun;
Mumuni, Ivy;
Tehrany, Rokhsaneh;
Player, Darren;
Carlson, Tom;
(2025)
Validation of a wearable low-cost EMG prototype device to support
knee extension exercises.
In:
Proceedings of the 47th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC).
IEEE: Copenhagen, Denmark.
(In press).
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Abstract
As the demand for home-based musculoskeletal (MSK) rehabilitation grows, developing a wearable, costeffective, and efficient device to monitor kinematics and muscle activity during exercises has become increasingly important. Traditional surface electromyography (sEMG) systems are expensive, complex, and require expert application, making them unsuitable for home use. This study introduces a wearable low-cost prototype device to address these challenges. The device consists of an sEMG sensor and two inertial measurement units to estimate joint kinematics. This study validated the feasibility of measuring joint angles under various conditions by comparing measurements obtained from the device to the OptiTrack motion capture system. Additionally, the relationships between joint angles and muscle activation, as well as limb dominance and muscle activation, were explored to validate its feasibility for measuring muscle activation. Following ethical approval, fifteen healthy participants performed knee extensor maximum voluntary isometric contractions at different knee joint angles as well as dynamic knee extensions under varying loads. The results demonstrated that the overall root mean square error between the OptiTrack motion capture system across both static and dynamic tests ranged from 7.2° to 16.8°. The device showed excellent repeatability in measuring knee joint angles during the static test and acceptable repeatability during the dynamic test. The observed decrease in quadriceps muscle activation with increasing knee angle, and higher muscle activation in the nondominant leg during dynamic tests, as well as greater force in the dominant leg during static tests, align with previous literature.
| Type: | Proceedings paper |
|---|---|
| Title: | Validation of a wearable low-cost EMG prototype device to support knee extension exercises |
| Event: | 47th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2025) |
| Location: | Copenhagen, Denmark |
| Dates: | 14 Jul 2025 - 17 May 2025 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://embc.embs.org/2025/ |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10208046 |
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