{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T02:15:54Z","timestamp":1775441754051,"version":"3.50.1"},"reference-count":55,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,4,5]],"date-time":"2026-04-05T00:00:00Z","timestamp":1775347200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"2019 Nippon Sport Science University Academic Research Grant","award":["No. 019-049"],"award-info":[{"award-number":["No. 019-049"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Sleep quality is essential for maintaining physical health and psychological resilience. Because sleepwear remains in direct contact with the skin throughout the night, it may affect thermoregulation and comfort and, thereby, influence sleep. This randomized two-period, two-sequence crossover study investigated whether sleepwear infused with nanodiamond and nanoplatinum particles (DPV576) could improve sleep quality and promote fatigue recovery under free-living conditions. Fourteen healthy men (23.9 \u00b1 1.7 years) wore DPV576 sleepwear and visually indistinguishable standard polyester sleepwear for one week each, separated by a one-week washout. Sleep was assessed using a wearable ECG-based actigraphy device; trained researchers additionally performed manual rescoring to verify automated outputs, including independent determination of sleep onset latency. Subjective sleep was assessed daily using the Sleep Quality Index of Daily Sleep and a visual analog scale; exploratory outcomes included voice-derived biomarkers and pre-\/post-sleep grip strength. In manual rescoring, DPV576 was associated with higher sleep efficiency (93.0 \u00b1 0.9% vs. 89.5 \u00b1 1.5%, p &lt; 0.05), fewer awakenings (8.4 \u00b1 1.3 vs. 10.7 \u00b1 1.4, p &lt; 0.01), and shorter wake after sleep onset (30.4 \u00b1 4.7 vs. 41.6 \u00b1 6.0 min, p &lt; 0.01), whereas total sleep time did not differ significantly (p = 0.096). These findings suggest that one-week use of DPV576 sleepwear may improve wearable ECG-derived sleep consolidation in young men, supporting a nonpharmacological wearable strategy to enhance sleep efficiency in everyday settings.<\/jats:p>","DOI":"10.3390\/s26072247","type":"journal-article","created":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T01:12:33Z","timestamp":1775437953000},"page":"2247","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Effects of Sleepwear Incorporating a DPV576 Functional Polyester Fabric on Wearable ECG-Derived Sleep Consolidation: A Randomized Two-Period Crossover Study Under Free-Living Conditions"],"prefix":"10.3390","volume":"26","author":[{"given":"Hideki","family":"Katano","sequence":"first","affiliation":[{"name":"Faculty of Sport Science, Nippon Sport Science University, Tokyo 158-8508, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masaaki","family":"Sugita","sequence":"additional","affiliation":[{"name":"Faculty of Sport Science, Nippon Sport Science University, Tokyo 158-8508, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2691-6979","authenticated-orcid":false,"given":"Shinichi","family":"Tokuno","sequence":"additional","affiliation":[{"name":"Graduate School of Health Innovation, Kanagawa University of Human Services, Yokosuka 238-8522, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yumi","family":"Nomura","sequence":"additional","affiliation":[{"name":"Faculty of Creative Engineering, Chiba Institute of Technology, Narashino 275-0016, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naoya","family":"Nishino","sequence":"additional","affiliation":[{"name":"Stanford Medicine, Stanford University, Stanford, CA 94304, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masakazu","family":"Higuchi","sequence":"additional","affiliation":[{"name":"Graduate School of Health Innovation, Kanagawa University of Human Services, Yokosuka 238-8522, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yusuke","family":"Iwai","sequence":"additional","affiliation":[{"name":"Stanford Medicine, Stanford University, Stanford, CA 94304, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuki","family":"Matsuki","sequence":"additional","affiliation":[{"name":"Faculty of Nursing Department of Nursing, Komazawa Women\u2019s University, Inagi 206-8511, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pengyu","family":"Deng","sequence":"additional","affiliation":[{"name":"Graduate School of Health and Sports Science, Juntendo University, Chiba 270-1695, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seiji","family":"Nishino","sequence":"additional","affiliation":[{"name":"Stanford Medicine, Stanford University, Stanford, CA 94304, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1484","DOI":"10.1093\/eurheartj\/ehr007","article-title":"Sleep Duration Predicts Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Studies","volume":"32","author":"Cappuccio","year":"2011","journal-title":"Eur. 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