{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,22]],"date-time":"2025-12-22T10:44:47Z","timestamp":1766400287939,"version":"3.43.0"},"reference-count":41,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"2","funder":[{"name":"Funda\u00c3\u00a7\u00c3\u00a3o para a Ci\u00c3ncia e Tecnologia","award":["UIDB\/00447\/2020"],"award-info":[{"award-number":["UIDB\/00447\/2020"]}]}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:p>Fitas, A, Santos, P, Gomes, M, Pezarat-Correia, P, Schoenfeld, BJ, and Mendonca, GV. Prediction of one repetition maximum in free-weight back squat using a mixed approach: the combination of the individual load-velocity profile and generalized equations. <jats:italic toggle=\"yes\">J Strength Cond Res<\/jats:italic> 38(2): 228\u2013235, 2024\u2014We aimed to develop a mixed methods approach for 1 repetition maximum (1RM) prediction based on the development of generalized equations and the individual load-velocity profile (LVP), and to explore the validity of such equations for 1RM prediction. Fifty-seven young men volunteered to participate. The submaximal load-velocity relationship was obtained for the free-weight parallel back squat. The estimated load at 0 velocity (LD0) was used as a single predictor, and in combination with the slope of the individual LVP, to develop equations predictive of 1RM. Prediction accuracy was determined through the mean absolute percent error and Bland-Altman plots. LD0 was predictive of 1RM (<jats:italic toggle=\"yes\">p<\/jats:italic> &lt; 0.0001), explaining 70.2% of its variance. Adding the slope of the LVP to the model increased the prediction power of 1RM to 84.4% (<jats:italic toggle=\"yes\">p<\/jats:italic> &lt; 0.0001). The absolute percent error between actual and predicted 1RM was lower for the predictions combining LD0 and slope (6.9 vs. 9.6%). The mean difference between actual and estimated 1RM was nearly zero and showed heteroscedasticity for the LD0 model, but not for the combined model. The limits of agreement error were of 31.9 and 23.5 kg for LD0 and LD0 combined with slope, respectively. In conclusion, the slope of the individual LVP adds predictive value to LD0 in 1RM estimation on a group level and avoids error trends in the estimation of 1RM over the entire spectrum of muscle strength. However, the use of mixed methods does not reach acceptable accuracy for 1RM prediction of the free-weight back squat on an individual basis.<\/jats:p>","DOI":"10.1519\/jsc.0000000000004632","type":"journal-article","created":{"date-parts":[[2023,12,13]],"date-time":"2023-12-13T13:04:54Z","timestamp":1702472694000},"page":"228-235","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":16,"title":["Prediction of One Repetition Maximum in Free-Weight Back Squat Using a Mixed Approach: The Combination of the Individual Load-Velocity Profile and Generalized Equations"],"prefix":"10.1519","volume":"38","author":[{"given":"Afonso","family":"Fitas","sequence":"first","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal;"}]},{"given":"Paulo","family":"Santos","sequence":"additional","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal;"},{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and"}]},{"given":"Miguel","family":"Gomes","sequence":"additional","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal;"},{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and"}]},{"given":"Pedro","family":"Pezarat-Correia","sequence":"additional","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal;"},{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and"}]},{"given":"Brad J.","family":"Schoenfeld","sequence":"additional","affiliation":[{"name":"Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, New York"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8161-8598","authenticated-orcid":false,"given":"Goncalo V.","family":"Mendonca","sequence":"additional","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal;"},{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and"}]}],"member":"276","published-online":{"date-parts":[[2023,12,13]]},"reference":[{"key":"R1-20250812","doi-asserted-by":"crossref","first-page":"743","DOI":"10.1177\/1747954117738243","article-title":"Load\u2013velocity profiling in the military press exercise: Effects of gender and training","volume":"13","author":"Balsalobre-Fern\u00e1ndez","year":"2018","journal-title":"Int J Sports Sci 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