{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T15:00:18Z","timestamp":1772118018900,"version":"3.50.1"},"reference-count":44,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2025,8,12]],"date-time":"2025-08-12T00:00:00Z","timestamp":1754956800000},"content-version":"vor","delay-in-days":11,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Brain and Behavior"],"published-print":{"date-parts":[[2025,8]]},"abstract":"ABSTRACT<\/jats:title>\n \n Purpose:<\/jats:title>\n \n We investigated sleep\u2010restriction (SR, two nights) on evening (5:00 p.m.) weightlifting and effects following a 1\u2010h nap. Thirty strength\u2010trained males were allocated into two groups, either 4\u2010h [SR\n 4<\/jats:sub>\n ] or 3\u2010h sleep [SR\n 3<\/jats:sub>\n ], retiring at either 02:30 or 03:30 p.m. and waking at 06:30 p.m. for two nights), with 5:00 p.m. grip\u2010strength and bench\u2010press; and whether performance improves at 5:00 p.m. after a 1:00 p.m. nap (0 or 60\u2010min).\n <\/jats:p>\n <\/jats:sec>\n \n Method<\/jats:title>\n \n Both groups undertook a one\u2010repetition\u2010max (1RM) for bench press and were randomly allocated either condition (i) no (N\n 0<\/jats:sub>\n ) then (ii) a 60\u2010min nap (N\n 60<\/jats:sub>\n ). Intra\u2010aural temperature\/profile\u2010of\u2010mood\u2010scores\/alertness\/tiredness\/sleepiness values were measured at 08:00 a.m., 11:00 a.m., 2:00 p.m., and 5:00 p.m. following the two nights of SR. At 5:00 p.m., a warm\u2010up, right\u2010hand grip strength, followed by lifts (40, 60, and 80% of 1RM) for bench press with recovery occurred. A linear encoder, attached to the bar, measured peak\u2010power (PP), peak\u2010velocity (PV), displacement (D) and time\u2010to\u2010peak velocity (tPV). Grip strength was not affected by SR or nap (\n p<\/jats:italic>\n > 0.005). PP and PV were lower and tPV longer in the SR\n 4<\/jats:sub>\n versus SR\n 3<\/jats:sub>\n group, reflecting a higher 1RM. Lower tiredness\/fatigue\/confusion\/sleepiness and an increase in alertness in the SR\n 4<\/jats:sub>\n group than SR\n 3,<\/jats:sub>\n reflecting effects of greater sleep loss on tiredness\/alertness\/sleepiness\/mood. Time\u2010of\u2010day effects were shown in temperature\/subjective\/mood\u2010responses (\n p<\/jats:italic>\n < 0.05), with positive modifications in sleepiness\/alertness\/tiredness after the 1\u2010h nap at 1:00 p.m. in both the SR\n 3<\/jats:sub>\n an SR\n 4<\/jats:sub>\n groups.\n <\/jats:p>\n <\/jats:sec>\n \n Finding<\/jats:title>\n \n Improvements in PV after the 1\u2010h nap were only found in the SR\n 3<\/jats:sub>\n condition (\n p<\/jats:italic>\n = 0.029). In summary, a dose\u2010response of sleep loss on subjective values and mood was found (SR\n 3<\/jats:sub>\n worse than SR\n 4<\/jats:sub>\n ). But not grip\u2010strength or bench\u2010press \u2013strength being resistant to sleep loss and a stronger cohort in the SR\n 3<\/jats:sub>\n than the SR\n 4<\/jats:sub>\n group.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n \n Implementing a nap (N\n 60<\/jats:sub>\n ) improved alertness\/vigor\/happiness and some strength measures (\u2191PV) for bench press compared to N\n 0<\/jats:sub>\n , but this was only effective for the SR\n 3<\/jats:sub>\n condition.\n <\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/brb3.70741","type":"journal-article","created":{"date-parts":[[2025,8,12]],"date-time":"2025-08-12T07:50:23Z","timestamp":1754985023000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Exploring a Critical Threshold in Sleep Loss on Subsequent Evening Performance, Following Two Nights Partial Sleep Restriction: A Secondary Analysis is Implementing a Post\u2010lunch Nap Beneficial?"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8913-0941","authenticated-orcid":false,"given":"Ben Joseph","family":"Edwards","sequence":"first","affiliation":[{"name":"Research Institute for Sport and Exercise Sciences Liverpool John Moores University Liverpool UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ellis","family":"Brotherton","sequence":"additional","affiliation":[{"name":"Research Institute for Sport and Exercise Sciences Liverpool John Moores University Liverpool UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1855-5552","authenticated-orcid":false,"given":"Adrian","family":"Markov","sequence":"additional","affiliation":[{"name":"Research Institute for Sport and Exercise Sciences Liverpool John Moores University Liverpool UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-8574-5456","authenticated-orcid":false,"given":"Theresa","family":"Toussaint","sequence":"additional","affiliation":[{"name":"Philipps\u2010Universit\u00e4t Marburg Marburg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8868-2936","authenticated-orcid":false,"given":"Magali","family":"Giacomoni","sequence":"additional","affiliation":[{"name":"UFR STAPS, Laboratoire J\u2010AP2S Universit\u00e9 De Toulon Toulon France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0712-4482","authenticated-orcid":false,"given":"Chloe","family":"Gallagher","sequence":"additional","affiliation":[{"name":"Research Institute for Sport and Exercise Sciences Liverpool John Moores University Liverpool UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7680-3991","authenticated-orcid":false,"given":"Samuel Andrew","family":"Pullinger","sequence":"additional","affiliation":[{"name":"Research Institute for Sport and Exercise Sciences Liverpool John Moores University Liverpool UK"},{"name":"Sport Science Department Inspire Institute of Sport Vidyanagar 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