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However, there still lacks a cost\u2010effective, energy\u2010saving, and computational complexity\u2010reducing solution for this specific demand. Here, a motion capturing and energy harvesting hybridized lower\u2010limb (MC\u2010EH\u2010HL) system with 3D printing is demonstrated. It enables low\u2010frequency biomechanical energy harvesting with a sliding block\u2010rail piezoelectric generator (S\u2010PEG) and lower\u2010limb motion sensing with a ratchet\u2010based triboelectric nanogenerator (R\u2010TENG). A unique S\u2010PEG is proposed with particularly designed mechanical structures to convert lower\u2010limb 3D motion into 1D linear sliding on the rail. On the one hand, high output power is achieved with the S\u2010PEG working at a very low frequency, which realizes self\u2010sustainable systems for wireless sensing under the Internet of Things framework. On the other hand, the R\u2010TENG gives rise to digitalized triboelectric output, matching the rotation angles to the pulse numbers. Additional physical parameters can be estimated to enrich the sensory dimension. Accordingly, demonstrative rehabilitation, human\u2010machine interfacing in virtual reality, and sports monitoring are presented. This developed hybridized system exhibits an economic and energy\u2010efficient solution to support the need for lower\u2010limb motion tracking in various scenarios, paving the way for self\u2010sustainable multidimensional motion tracking systems in near future.<\/jats:p>","DOI":"10.1002\/advs.202101834","type":"journal-article","created":{"date-parts":[[2021,8,20]],"date-time":"2021-08-20T02:00:43Z","timestamp":1629424843000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":147,"title":["A Motion Capturing and Energy Harvesting Hybridized Lower\u2010Limb System for Rehabilitation and Sports Applications"],"prefix":"10.1002","volume":"8","author":[{"given":"Shan","family":"Gao","sequence":"first","affiliation":[{"name":"School of Mechatronics Engineering Harbin Institute of Technology  Harbin 150001 China"},{"name":"Department of Electrical and Computer Engineering National University of Singapore  4 Engineering Drive 3 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