{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T01:33:04Z","timestamp":1776821584490,"version":"3.51.2"},"reference-count":14,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"2","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2022,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:p>Sim\u00e3o, R, Polito, M, de Salles, BF, Marinho, DA, Garrido, ND, Santos Junior, ERT, and Willardson, JM. Acute and long-term comparison of fixed vs. self-selected rest interval between sets on upper-body strength. <jats:italic toggle=\"yes\">J Strength Cond Res<\/jats:italic> 36(2): 540\u2013544, 2022\u2014The effects of different rest interval durations between sets has been widely studied, but only recently, the self-selected rest interval (SSRI) has been a matter of interest. However, previous studies comparing fixed and SSRI have investigated only acute responses. The purpose of this study was to analyze the acute and long-term effects of a fixed rest interval (FRI) vs. an SSRI between sets on upper-body performance and strength gains. Thirty-three trained men were randomly divided into 2 groups: FRI (75 seconds between sets), and SSRI. Both groups performed 3 sets with 75% of 1-repetition maximum until repetition failure in the chest press (CP), lat pull-down (LPD), shoulder press (SP), and seated row (SR) 3 times a week for 8 weeks. The results demonstrated that the SSRI allowed for significantly greater repetition performance vs. the FRI in the CP (26.1 \u00b1 2.0 vs. 21.5 \u00b1 1.8), LPD (30.1 \u00b1 2.3 vs. 24.9 \u00b1 1.9), SP (24.0 \u00b1 2.8 vs. 17.4 \u00b1 1.5), and SR (26.3 \u00b1 1.6 vs. 22.0 \u00b1 1.6). In addition, the following strength gains were observed: SSRI (CP: 6.8%, LPD: 8.0%, SP: 6.7%, SR: 7.8%) and FRI (CP: 7.4%, LPD: 6.7%, SP: 6.1%, SR: 7.0%) without significant differences between the groups. In conclusion, within an 8-week period, both protocols seem to be effective for strength gains, despite the higher training volume accomplished by the SSRI group. However, the FRI was 37% more time efficient.<\/jats:p>","DOI":"10.1519\/jsc.0000000000003606","type":"journal-article","created":{"date-parts":[[2020,8,21]],"date-time":"2020-08-21T10:10:12Z","timestamp":1598004612000},"page":"540-544","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":8,"title":["Acute and Long-Term Comparison of Fixed vs. Self-Selected Rest Interval Between Sets on Upper-Body Strength"],"prefix":"10.1519","volume":"36","author":[{"given":"Roberto","family":"Sim\u00e3o","sequence":"first","affiliation":[{"name":"Strength Training Laboratory, Universidade Federal do Rio de janeiro, UFRJ, Rio de Janeiro, Brazil;"},{"name":"Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), UBI, Covilh\u00e3, Portugal;"}]},{"given":"Marcos","family":"Polito","sequence":"additional","affiliation":[{"name":"Physical Education Department, UEL, Paran\u00e1, Brazil;"}]},{"given":"Belmiro","family":"Freitas de Salles","sequence":"additional","affiliation":[{"name":"Strength Training Laboratory, Universidade Federal do Rio de janeiro, UFRJ, Rio de Janeiro, Brazil;"}]},{"given":"Daniel Almeida","family":"Marinho","sequence":"additional","affiliation":[{"name":"Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), UBI, Covilh\u00e3, Portugal;"}]},{"given":"Nuno D.","family":"Garrido","sequence":"additional","affiliation":[{"name":"Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), UBI, Covilh\u00e3, Portugal;"},{"name":"Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), UTAD, Vila Real, Portugal; and"}]},{"given":"Evaldo Rui Tavares Santos","family":"Junior","sequence":"additional","affiliation":[{"name":"Strength Training Laboratory, Universidade Federal do Rio de janeiro, UFRJ, Rio de Janeiro, Brazil;"}]},{"given":"Jeffrey M.","family":"Willardson","sequence":"additional","affiliation":[{"name":"Health and Human Performance Department, Montana State University Billings, Billings, Montana"}]}],"member":"276","published-online":{"date-parts":[[2020,8,18]]},"reference":[{"key":"R2-20250805","doi-asserted-by":"crossref","first-page":"927","DOI":"10.1080\/17461391.2016.1161831","article-title":"Effects of fixed vs. self-suggested rest between sets in upper and lower body exercises performance","volume":"16","author":"de Salles","year":"2016","journal-title":"Eur J Sport Sci"},{"key":"R3-20250805","doi-asserted-by":"crossref","first-page":"765","DOI":"10.2165\/11315230-000000000-00000","article-title":"Rest interval between sets in strength training","volume":"39","author":"de Salles","year":"2009","journal-title":"Sports Med"},{"key":"R4-20250805","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1016\/j.jsams.2009.08.002","article-title":"Strength increases in upper and lower body are larger with longer inter-set rest intervals in trained men","volume":"13","author":"de Salles","year":"2010","journal-title":"J Sci Med Sport"},{"key":"R5-20250805","doi-asserted-by":"crossref","first-page":"499","DOI":"10.1007\/s40279-017-0793-0","article-title":"Volume for muscle hypertrophy and health outcomes: The most effective variable in resistance training","volume":"48","author":"Figueiredo","year":"2018","journal-title":"Sports Med"},{"key":"R6-20250805","doi-asserted-by":"crossref","first-page":"133","DOI":"10.2165\/00007256-200636020-00004","article-title":"Neural adaptations to resistive exercise: Mechanisms and recommendations for training practices","volume":"36","author":"Gabriel","year":"2006","journal-title":"Sports Med"},{"key":"R7-20250805","doi-asserted-by":"crossref","first-page":"2371","DOI":"10.1519\/JSC.0000000000001699","article-title":"Tapering practices of croatian open-class powerlifting champions","volume":"31","author":"Grgic","year":"2017","journal-title":"J Strength Cond Res"},{"key":"R8-20250805","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1007\/s40279-017-0788-x","article-title":"Effects of rest interval duration in resistance training on measures of muscular strength: A systematic review","volume":"48","author":"Grgic","year":"2018","journal-title":"Sports Med"},{"key":"R9-20250805","first-page":"1032","article-title":"Effect of two different rest period lengths on the number of repetitions performed during resistance training","volume":"21","author":"Miranda","year":"2007","journal-title":"J Strength Cond Res"},{"key":"R10-20250805","doi-asserted-by":"crossref","first-page":"1275","DOI":"10.1519\/JSC.0000000000001237","article-title":"Long rest interval promotes durable testosterone responses in high-intensity bench press","volume":"30","author":"Scudese","year":"2016","journal-title":"J Strength Cond Res"},{"key":"R11-20250805","doi-asserted-by":"crossref","first-page":"3157","DOI":"10.1519\/JSC.0b013e318212e23b","article-title":"The effect of rest interval length on multi and single-joint exercise performance and perceived exertion","volume":"25","author":"Senna","year":"2011","journal-title":"J Strength Cond Res"},{"key":"R12-20250805","doi-asserted-by":"crossref","first-page":"1389","DOI":"10.1519\/JSC.0b013e318231a659","article-title":"Comparison between linear and nonlinear periodized resistance training: Strength and muscle thickness effects","volume":"26","author":"Sim\u00e3o","year":"2012","journal-title":"J Strength Cond Res"},{"key":"R13-20250805","first-page":"978","article-title":"A brief review: Factors affecting the length of the rest interval between resistance exercise sets","volume":"20","author":"Willardson","year":"2006","journal-title":"J Strength Cond Res"},{"key":"R14-20250805","first-page":"400","article-title":"The effect of rest interval length on the sustainability of squat and bench press repetitions","volume":"20","author":"Willardson","year":"2006","journal-title":"J Strength Cond Res"},{"key":"R15-20250805","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1519\/JSC.0b013e31815f912d","article-title":"The effect of different rest intervals between sets on volume components and strength gains","volume":"22","author":"Willardson","year":"2008","journal-title":"J Strength Cond Res"}],"container-title":["Journal of Strength &amp; 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