Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2020) 19, 452 - 459

Research article
Analysis of the Load-Velocity Relationship in Deadlift Exercise
Alejandro Benavides-Ubric1, David M. Díez-Fernández2, Manuel A. Rodríguez-Pérez1,3, , Manuel Ortega-Becerra2, Fernando Pareja-Blanco2
Author Information
1 SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
2 Physical Performance & Sports Research Center, Universidad Pablo de Olavide, Seville, Spain
3 Department of Education, University of Almería, Almería, Spain

Manuel A. Rodríguez-Pérez
✉ Department of Education, SPORT Research Group (CTS-1024), CERNEP Research Center, University of Almería, Almería, Spain
Email: manolo.rodriguez@ual.es
Publish Date
Received: 06-01-2020
Accepted: 14-04-2020
Published (online): 13-08-2020
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ABSTRACT

The aim of this study was to analyze the relationship between movement velocity and relative load (%1RM) in the deadlift exercise. Fifty men (age = 23.8 ± 3.6 years, body mass = 78.2 ± 8.3 kg, height = 1.78 ± 0.06 m) performed a first evaluation (T1) consisting of a one-repetition maximum (1RM) test. Forty-two subjects performed a second evaluation (T2) after 6 weeks. Mean (MV), mean propulsive (MPV) and peak (PV) velocity measures of the concentric phase were analyzed. Load-velocity relationships were studied by fitting first order equations to the data using loads from 30-100% of 1RM. A comprehensive set of statistics for assessing bias and level of agreement to estimate the 1RM value from the different models was used. Stability of these relationships was assessed using the coefficient of variation (CV) and the intraclass correlation coefficient (ICC). General load-velocity equations provided good adjustments (R2 ~; 0.91-0.93), however individual load-velocity regressions provided better adjustments (R2 ~; 0.97). Individual estimations also showed higher agreement and more regular variation than general equations. Moreover, MPV showed smaller bias than the other velocity parameters (MV and PV). The stability analysis of the load-velocity relationships resulted in ICC values higher than 0.82 and CV lower than 3.0%. Monitoring repetition velocity allows estimation of the %1RM in the deadlift exercise. More accurate predictions of relative load can be obtained when using individualized regression equations instead of general equations.

Key words: Loading intensity, velocity-based training, maximal strength, one-repetition maximum, athletic performance


           Key Points
  • The movement velocity of the concentric phase is a valid alternative to quantify and adjust training intensity with great precision from the first repetition performed in the deadlift (DL) exercise.
  • Exists a relationship between movement velocity and relative load (%1RM) in the DL exercise
  • Mean velocities provide more reliable predictions of relative load in DL exercise instead of peak velocities.
  • In DL exercise, using individualized linear regression equations instead of general equations can be obtained more accurate predictions of relative load.
 
 
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