{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T07:26:24Z","timestamp":1790061984742,"version":"4.0.1"},"reference-count":38,"publisher":"PeerJ","license":[{"start":{"date-parts":[[2024,7,9]],"date-time":"2024-07-09T00:00:00Z","timestamp":1720483200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:sec>\n<jats:title>Background<\/jats:title>\n<jats:p>The present study aimed to investigate the effects of post-activation performance enhancement (PAPE) after three warm-up protocols on back squat performance in trained men.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Methods<\/jats:title>\n<jats:p>Fourteen resistance-trained men performed conditioning activity (CA) with high-load (HL-CA), low-load (LL-CA), or usual specific warm-up as a control (CON). HL-CA consisted of one set of three repetitions with 90% of one repetition maximum (RM); LL-CA consisted of one set of six repetitions with 45% of 1 RM performed at maximal velocity; CON involved eight repetitions with 45% of 1 RM at controlled velocity. The participant\u2019s performance was measured using the total number of repetitions and volume load (reps \u00d7 load \u00d7 sets).<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>There were no significant differences between warm-up for the total number of repetitions (<jats:italic>p<\/jats:italic> = 0.17) or total volume load (<jats:italic>p<\/jats:italic> = 0.15). There was no difference between conditions for the number of repetitions (main condition effect; <jats:italic>p<\/jats:italic> = 0.17); however, participants achieved a significantly higher volume load after HL-PAPE than after CON for the first set (<jats:italic>p<\/jats:italic> = 0.04).<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Conclusion<\/jats:title>\n<jats:p>High or low equated-load CA used as warm-up strategies did not potentiate subsequent performance enhancement in multiple-set back squat exercise performed until muscle failure in comparison with usual warm-up.<\/jats:p>\n<\/jats:sec>","DOI":"10.7717\/peerj.17347","type":"journal-article","created":{"date-parts":[[2024,7,9]],"date-time":"2024-07-09T07:11:18Z","timestamp":1720509078000},"page":"e17347","source":"Crossref","is-referenced-by-count":8,"title":["Effect of warm-up protocols using lower and higher loads on multiple-set back squat 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