Accuracy and reliability of perception bar velocity loss as a subjective method for autoregulation in resistance training
DOI:
https://doi.org/10.51224/SRXIV.207Keywords:
velocity-based training, back-squat, bench-press, velocity loss threshold, resistance training.Abstract
This study analyzed the accuracy and reliability of the perception of velocity loss as a method to autoregulate the repetitions intra-set using a moderate velocity loss threshold (15-30%). Twenty-two healthy men with resistance training experience (age 28.0 ± 4.3 years, body mass 85.8 ± 8.2 kg) completed a familiarization session to perform exercises with maximal intentional velocity during the concentric phase. After assessing the load-velocity profile in a second session, subjects were familiarized with the perception of velocity loss in a third session. Test-retest procedures were performed in two sessions one week apart, in which participants completed three sets of back-squat and bench press exercises at 40%, 60%, and 80% 1RM. Participants stopped the sets when reaching a moderate velocity loss threshold (15-30%) using their perception of velocity loss. A linear encoder recorded the mean propulsive velocity of the bar in all sessions. Accuracy and reliability were assessed through the deviation of mean values and the lower and upper limits of the confidence interval about the pre-established velocity loss range (15-30%). The PVL method showed acceptable accuracy in the test, which improved the retest for both exercises and intensities. For the test-retest reliability, similar values of percentage velocity loss were observed in the comparison between most series during test and retest (p>0.05). These results support the subjective method's accuracy and reliability based on the perception of velocity loss for autoregulation of intra-set repetitions with a moderate velocity loss threshold.
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Banyard HG, Nosaka K, Sato K, Haff GG. Validity of various methods for determining velocity, force, and power in the back squat. Int J Sports Physiol Perform 12: 1170–1176, 2017.
Colquhoun RJ, Gai CM, Walters J, Brannon AR, Kilpatrick MW, D’Agostino DP, et al. Comparison of powerlifting performance in trained men using traditional and flexible daily undulating periodization. J Strength Cond Res 31: 283–291, 2017.
Galiano C, Pareja-Blanco F, Mora JH,Villarreal ES. Low-velocity loss induces similar strength gains to moderate-velocity loss during resistance training. J Strength Cond Res Publish Ah: 1–6, 2020.
Gantois P, Fonseca FS, Nakamura FY, Fortes LS, Fernandez-Fernandez J, Ricarte Batista G. Analysis of velocity- and power-load relationships of the free-weight back-squat and hexagonal bar deadlift exercises. Biol Sport 40: 201–208, 2023.
González-Badillo J, Marques M, Sánchez-Medina L. The importance of movement velocity as a measure to control resistance training intensity. Journal Hum Kinet 29A: 15–19, 2011.
González-Badillo JJ, Yañez-García JM, Mora-Custodio R, Rodríguez-Rosell D. Velocity loss as a variable for monitoring resistance exercise. Int J Sports Med 38: 217–225, 2017.
Greig L, Stephens Hemingway BH, Aspe RR, Cooper K, Comfort P, Swinton PA. Autoregulation in resistance training: addressing the inconsistencies. Sport Med 50: 1873–1887, 2020.
Grgic J, Schoenfeld BJ. Are the hypertrophic adaptations to high and low-load resistance training muscle fiber type specific? Front Physiol 9: 402, 2018.
Helms ER, Cross MR, Brown SR, Storey A, Cronin J, Zourdos MC. Rating of perceived exertion as a method of volume autoregulation within a periodized program. J Strength Cond Res 32: 1627–1636, 2018.
Herrick AB, Stone WJ. The effects of periodization versus progressive resistance exercise on upper and lower body strength in women. J. Strength Cond. Res. 10: 72–76, 1996.
Hickmott LM, Chilibeck PD, Shaw KA, Butcher SJ. The effect of load and volume autoregulation on muscular strength and hypertrophy: A systematic review and meta-analysis. Sport Med - Open 8: 400–435, 2022.
Hughes LJ, Banyard HG, Dempsey AR, Peiffer JJ, Scott BR. Using load-velocity relationships to quantify training-induced fatigue. J Strength Cond Res 33: 762–773, 2019.
Izquierdo M, González-Badillo JJ, Häkkinen K, Ibáñez J, Kraemer WJ, Altadill A, et al. Effect of loading on unintentional lifting velocity declines during single sets of repetitions to failure during upper and lower extremity muscle actions. Int J Sports Med 27: 718–724, 2006.
Kraemer WJ, Adams K, Cafarelli E, Dudley GA, Dooly C, Feigenbaum MS, et al. Progression models in resistance training for healthy adults. Med Sci Sports Exerc 34: 364–380, 2002.
Larsen S, Kristiansen E, Van den Tillaar R. Effects of subjective and objective autoregulation methods for intensity and volume on enhancing maximal strength during resistance-training interventions: A systematic review. PeerJ 9, 2021.
Lazarus A, Halperin I, Vaknin GJ, Dello Iacono A. Perception of changes in bar velocity as a resistance training monitoring tool for athletes. Physiol Behav 231: 113316, 2021.
Mann JB, Thyfault JP, Ivey PA, Sayers SP. The effect of autoregulatory progressive resistance exercise vs. linear periodization on strength improvement in college athletes. J Strength Cond Res 24: 1718–1723, 2010.
McNamara JM, Stearne DJ. Flexible nonlinear periodization in a beginner college weight training class. J Strength Cond Res 24: 17–22, 2010.
Pallarés JG, Sánchez-Medina L, Pérez CE, De La Cruz-Sánchez E, Mora-Rodriguez R. Imposing a pause between the eccentric and concentric phases increases the reliability of isoinertial strength assessments. J Sports Sci 32: 1165–1175, 2014.
Pareja-Blanco F, Alcazar J, Sánchez-Valdepeñas J, Cornejo-Daza PJ, Piqueras-Sanchiz F, Mora-Vela R, et al. Velocity loss as a critical variable determining the adaptations to strength training. Med Sci Sport Exerc 52: 1752–1762, 2020.
Pareja-Blanco F, Rodríguez-Rosell D, Sánchez-Medina L, Gorostiaga E, González-Badillo J. Effect of movement velocity during resistance training on neuromuscular performance. Int J Sports Med 35: 916–924, 2014.
Pareja-Blanco, F, Rodríguez-Rosell, D, Sánchez-Medina, L, Sanchis-Moysi, J, Dorado C, Mora-Custodio R, et al. Effects of velocity loss during resistance training on athletic performance, strength gains and muscle adaptations. Scand J Med Sci Sports 27: 724–735, 2017.
Pareja-Blanco F, Sánchez-Medina L, Suárez-Arrones L, González-Badillo JJ. Effects of velocity loss during resistance training on performance in professional soccer players. Int J Sports Physiol Perform 12: 512–519, 2017.
Pérez-Castilla A, Piepoli A, Delgado-García G, Garrido-Blanca G, García-Ramos A. Reliability and concurrent validity of seven commercially available devices for the assessment of movement velocity at different intensities during the bench press. J Strength Cond Res 33: 1258–1265, 2019.
Peterson MD, Rhea MR, Alvar BA. Applications of the dose-response for muscular strength development: a review of meta-analytic efficacy and reliability for designing training prescription. J Strength Cond Res 19: 950, 2005.
Rhea, MR and Alderman, BL. A meta-analysis of periodized versus nonperiodized strength and power training programs. Res Q Exerc Sport 75: 413–422, 2004.
Rodríguez-Rosell D, Yáñez-García JM, Mora-Custodio R, Pareja-Blanco F, Ravelo-García AG, Ribas-Serna J, et al. Velocity-based resistance training: Impact of velocity loss in the set on neuromuscular performance and hormonal response. Appl Physiol Nutr Metab 45: 817–828, 2020.
Sánchez-Medina L, González-Badillo JJ. Velocity loss as an indicator of neuromuscular fatigue during resistance training. Med Sci Sport Exerc 43: 1725–1734, 2011.
Sanchez-Medina L, Perez CE, Gonzalez-Badillo JJ. Importance of the propulsive phase in strength assessment. Int J Sports Med 31: 123–129, 2010.
Schoenfeld BJ, Contreras B, Krieger J, Grgic J, Delcastillo K, Belliard, R, et al. Resistance training volume enhances muscle hypertrophy but not strength in trained men. Med Sci Sport Exerc 51: 94–103, 2019.
Schoenfeld BJ, Wilson JM, Lowery RP, Krieger JW. Muscular adaptations in low- versus high-load resistance training: A meta-analysis. Eur J Sport Sci 16: 1–10, 2016.
Shattock K, Tee JC. Autoregulation in resistance training: a comparison of subjective versus objective methods. J Strength Cond Res 36: 641–648, 2019.
Sindiani M, Lazarus A, Iacono A Dello, Halperin I. Perception of changes in bar velocity in resistance training: Accuracy levels within and between exercises. Physiol Behav 224: 113025, 2020.
Stöggl T, Lindinger S, Müller E. Reliability and validity of test concepts for the cross-country skiing sprint. Med Sci Sports Exerc 38: 586–591, 2006.
Thorborg K, Branci S, Nielsen MP, Langelund MT, Hölmich P. Copenhagen five-second squeeze: A valid indicator of sports-related hip and groin function. Br J Sports Med 51: 594–599, 2017.
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