Load–Velocity Relationship to Estimate the One-Repetition Maximum in the Hexagonal Bar Deadlift Exercise in Women

in Women in Sport and Physical Activity Journal

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Petrus GantoisAssociate Graduate Program in Physical Education, Federal University of Paraiba, João Pessoa (UPE/UFPB), PB, Brazil

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Drumond GiloGraduate Program in Physical Education, Federal University of Pernambuco, Recife, PE, Brazil

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Ana DeniseAssociate Graduate Program in Physical Education, Federal University of Paraiba, João Pessoa (UPE/UFPB), PB, Brazil

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Alejandro Muñoz-LópezDepartamento de Motricidad Humana y Rendimiento Deportivo, Education Sciences Faculty, University of Seville, Seville, Spain

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Fábio Yuzo NakamuraResearch Center in Sports Sciences, Health Sciences and Human Development (CIDESD), University of Maia (ISMAI), Maia, Portugal

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Fabiano de Souza FonsecaGraduate Program in Physical Education, Federal University of Pernambuco, Recife, PE, Brazil
Federal Rural University of Pernambuco (UFRPE), Recife, PE, Brazil

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In this study, we examined the load–velocity relationship in the hexagonal bar deadlift exercise in women. Twenty-seven resistance-trained women were recruited. Participants performed a progressive load test up to the one-repetition maximum (1RM) load for determining the individual load–velocity relationship in the hexagonal bar deadlift exercise. Bar velocity was measured in every repetition through a linear encoder. A very strong and negative relationship was found between the %1RM and bar velocity for the linear (R2 = .94; standard error of the estimation = 5.43% 1RM) and second-order polynomial (R2 = .95) regression models. The individual load–velocity relationship provided even better adjustments (R2 = .98; coefficient of variation = 1.77%) than the general equation. High agreement level and low bias were found between actual and predicted 1RM for the general load–velocity relationship (intraclass correlation coefficient = .97 and 95% confidence interval [0.90, 0.99]; bias = −2.59 kg). In conclusion, bar velocity can be used to predict 1RM with high accuracy during hexagonal bar deadlift exercise in resistance-trained women.

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