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This study introduces an AI\u2010assisted wearable hip joint energy harvester (HJEH) designed to convert mechanical energy from hip joint movements into electric power for wearable devices while simultaneously monitoring human motion. The HJEH utilizes an electromagnetic generator (EMG) in conjunction with a freestanding triboelectric nanogenerator (FS\u2010TENG) to achieve energy harvesting and motion sensing. The EMG specifically recovers the negative energy from hip joint motion to generate electricity, with a flywheel and acceleration gears employ to enhance output power. Concurrently, the FS\u2010TENG generates triboelectric signals driven by hip joint motions, which are processed using deep learning algorithms for accurate motion detection. The performance of the HJEH is thoroughly evaluated through bench tests, treadmill tests, and outdoor experiments. The EMG achieves a peak power output of 357 mW and a maximum gravitational power density of 1.67 W kg<jats:sup>\u22121<\/jats:sup> during running at a speed of 8 km h<jats:sup>\u22121<\/jats:sup>. The FS\u2010TENG demonstrates a remarkable accuracy of 99.95% in identifying 12 different types of motion, validating the efficacy of the integrated motion monitoring system. In particular, incorporating digital twin technology realizes safety monitoring for the elderly.<\/jats:p>","DOI":"10.1002\/smll.202500643","type":"journal-article","created":{"date-parts":[[2025,4,7]],"date-time":"2025-04-07T06:57:08Z","timestamp":1744009028000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Hybrid Electromagnetic\u2010Triboelectric Hip Energy Harvester for Wearables and AI\u2010Assisted Motion Monitoring"],"prefix":"10.1002","volume":"21","author":[{"given":"Daning","family":"Hao","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering Southwest Jiaotong University  Chengdu 610031 China"},{"name":"School of Civil and Environmental Engineering Nanyang Technological University  Singapore 639798 Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengliang","family":"Fan","sequence":"additional","affiliation":[{"name":"School of Information Science and Technical Southwest Jiaotong University  Chengdu 610031 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaofeng","family":"Xia","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering Southwest Jiaotong University  Chengdu 610031 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2641-2049","authenticated-orcid":false,"given":"Zutao","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering Southwest Jiaotong University  Chengdu 610031 China"},{"name":"Chengdu Technological University  Chengdu 611730 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaowen","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Civil and Environmental Engineering Nanyang Technological University  Singapore 639798 Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,4,6]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202404771"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.nanoen.2023.109151"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202004178"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202206309"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsnano.3c10033"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202311036"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.mattod.2023.11.001"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202402452"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202108091"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/advs.202303114"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/sstr.202300282"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40820-023-01013-9"},{"key":"e_1_2_8_13_1","first-page":"18","volume":"14","author":"Lange H. 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