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Easy access to muscle sensing can offer new opportunities to Human-Computer Interaction (HCI) research. Off-the-shelf sensors often only provide low-level access, hence requiring expertise in signal processing and widening the gulf of execution for users without engineering skills. To address this challenge, we introduce EMBody, a data-centric toolkit for EMG-based interface prototyping and experimentation. EMBody offers multiple levels of prototyping fidelity for EMG sensing, signal processing, and data interpretation. Our data-centric toolkit encapsulates the different data representation stages, offering a wide range of customization opportunities to experts while also allowing non-technical designers to focus on creating new interaction techniques. EMBody features a lightweight form factor and wireless connectivity. Additionally, the system leverages an exploration-centered workflow by allowing rapid access to measurement data via the accompanying software. Users define a set of motions to be recognized and interactively provide example data points. The toolkit then handles signal processing and classification. The recognized movements are streamed on the local network, ready to be used by interactive applications. This paper reports on how to use EMBody and its implementation. We iteratively developed the toolkit in a series of workshops and example applications. Users who had none or very limited knowledge of EMG could rapidly create engaging functional prototypes, while experts appreciated the modularity of the software component allowing for a high degree of customization. We contribute the software and hardware components of EMBody as a tool for the research community to stimulate creative exploration of EMG systems.<\/jats:p>","DOI":"10.1145\/3457142","type":"journal-article","created":{"date-parts":[[2021,5,30]],"date-time":"2021-05-30T01:31:19Z","timestamp":1622338279000},"page":"1-29","update-policy":"http:\/\/dx.doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":9,"title":["EMBody: A Data-Centric Toolkit for EMG-Based Interface Prototyping and Experimentation"],"prefix":"10.1145","volume":"5","author":[{"given":"Jakob","family":"Karolus","sequence":"first","affiliation":[{"name":"LMU Munich, Munich, Germany"}]},{"given":"Francisco","family":"Kiss","sequence":"additional","affiliation":[{"name":"University of Stuttgart, Stuttgart, Germany"}]},{"given":"Caroline","family":"Eckerth","sequence":"additional","affiliation":[{"name":"LMU Munich, Munich, Germany"}]},{"given":"Nicolas","family":"Viot","sequence":"additional","affiliation":[{"name":"ENAC, Toulouse, France"}]},{"given":"Felix","family":"Bachmann","sequence":"additional","affiliation":[{"name":"LMU Munich, Munich, Germany"}]},{"given":"Albrecht","family":"Schmidt","sequence":"additional","affiliation":[{"name":"LMU Munich, Munich, Germany"}]},{"given":"Pawel W.","family":"Wozniak","sequence":"additional","affiliation":[{"name":"Utrecht University, Utrecht, Netherlands"}]}],"member":"320","published-online":{"date-parts":[[2021,5,29]]},"reference":[{"key":"e_1_2_2_1_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-031-02217-3"},{"key":"e_1_2_2_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/2858036.2858220"},{"key":"e_1_2_2_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/2702123.2702451"},{"key":"e_1_2_2_4_1","doi-asserted-by":"publisher","DOI":"10.1145\/1240624.1240747"},{"key":"e_1_2_2_5_1","volume-title":"Embodied interaction: Exploring the foundations of a new approach to HCI. 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