The effects of 10%, 20%, and 30% velocity loss thresholds on kinetic, kinematic, and repetition characteristics during the barbell back squat

Journal article


Weakley, Jonathon, Ramirez-Lopez, Carlos, McLaren, Shaun, Dalton-Barron, Nicholas, Weaving, Dan, Jones, Ben, Till, Kevin and Banyard, Harry. (2020) The effects of 10%, 20%, and 30% velocity loss thresholds on kinetic, kinematic, and repetition characteristics during the barbell back squat. International Journal of Sports Physiology and Performance. 15(2), pp. 180 - 188. https://doi.org/10.1123/ijspp.2018-1008
AuthorsWeakley, Jonathon, Ramirez-Lopez, Carlos, McLaren, Shaun, Dalton-Barron, Nicholas, Weaving, Dan, Jones, Ben, Till, Kevin and Banyard, Harry
Abstract

Purpose: Prescribing resistance training using velocity loss thresholds can enhance exercise quality by mitigating neuromuscular fatigue. As little is known regarding performance during these protocols, we aimed to assess the effects of 10%, 20%, and 30% velocity loss thresholds on kinetic, kinematic, and repetition characteristics in the free-weight back squat. Methods: Using a randomized crossover design, 16 resistance-trained men were recruited to complete 5 sets of the barbell back squat. Lifting load corresponded to a mean concentric velocity (MV) of ∼0.70 m·s−1 (115 [22] kg). Repetitions were performed until a 10%, 20%, or 30% MV loss was attained. Results: Set MV and power output were substantially higher in the 10% protocol (0.66 m·s−1 and 1341 W, respectively), followed by the 20% (0.62 m·s−1 and 1246 W) and 30% protocols (0.59 m·s−1 and 1179 W). There were no substantial changes in MV (−0.01 to −0.02 m·s−1) or power output (−14 to −55 W) across the 5 sets for all protocols, and individual differences in these changes were typically trivial to small. Mean set repetitions were substantially higher in the 30% protocol (7.8), followed by the 20% (6.4) and 10% protocols (4.2). There were small to moderate reductions in repetitions across the 5 sets during all protocols (−39%, −31%, −19%, respectively), and individual differences in these changes were small to very large. Conclusions: Velocity training prescription maintains kinetic and kinematic output across multiple sets of the back squat, with repetition ranges being highly variable. Our findings, therefore, challenge traditional resistance training paradigms (repetition based) and add support to a velocity-based approach.

Keywordsvelocity-based training; power; resistance training
Year2020
JournalInternational Journal of Sports Physiology and Performance
Journal citation15 (2), pp. 180 - 188
PublisherHuman Kinetics Publishers Inc.
ISSN1555-0265
Digital Object Identifier (DOI)https://doi.org/10.1123/ijspp.2018-1008
Scopus EID2-s2.0-85077033331
Page range180 - 188
Research GroupSports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre
Publisher's version
File Access Level
Controlled
Place of publicationUnited States of America
Permalink -

https://acuresearchbank.acu.edu.au/item/8q41x/the-effects-of-10-20-and-30-velocity-loss-thresholds-on-kinetic-kinematic-and-repetition-characteristics-during-the-barbell-back-squat

Restricted files

Publisher's version

  • 9
    total views
  • 0
    total downloads
  • 0
    views this month
  • 0
    downloads this month
These values are for the period from 19th October 2020, when this repository was created.

Export as

Related outputs

The Quality, Quantity, and Intraindividual Variability of Sleep Among Students and Student-Athletes
Leduc, Cédric, Tee, Jason, Weakley, Jonathon, Ramírez, Carlos A. and Jones, Ben. (2020) The Quality, Quantity, and Intraindividual Variability of Sleep Among Students and Student-Athletes. Sports Health. 12(1), pp. 43 - 50. https://doi.org/10.1177/1941738119887966
Criterion validity, and interunit and between-day reliability of the FLEX for measuring barbell velocity during commonly used resistance training exercises
Weakley, Jonathon, Chalkley, Daniel, Johnston, Rich, García-Ramos, Amador, Townshend, Andrew, Dorrell, Harry, Pearson, Madison, Morrison, Matthew and Cole, Michael. (2020) Criterion validity, and interunit and between-day reliability of the FLEX for measuring barbell velocity during commonly used resistance training exercises. The Journal of Strength and Conditioning Research. 34(6), pp. 1519 - 1524. https://doi.org/10.1519/JSC.0000000000003592
Reliability of the velocity achieved during the last repetition of sets to failure and its association with the velocity of the 1-repetition maximum
García-Ramos, Amador, Janicijevic, Danica, González-Hernández, Jorge M., Keogh, Justin W. L. and Weakley, Jonathon. (2020) Reliability of the velocity achieved during the last repetition of sets to failure and its association with the velocity of the 1-repetition maximum. PeerJ. 8, pp. 1 - 14. https://doi.org/10.7717/peerj.8760
Application of velocity loss thresholds during free-weight resistance training: Responses and reproducibility of perceptual, metabolic, and neuromuscular outcomes
Weakley, Jonathon, McLaren, Shaun, Ramirez-Lopez, Carlos, García-Ramos, Amador, Dalton-Barron, Nicholas, Banyard, Harry, Mann, Bryan, Weaving, Dan and Jones, Ben. (2020) Application of velocity loss thresholds during free-weight resistance training: Responses and reproducibility of perceptual, metabolic, and neuromuscular outcomes. Journal of Sports Sciences. 38(5), pp. 477 - 485. https://doi.org/10.1080/02640414.2019.1706831
Effect of competition frequency on strength performance of powerlifting athletes
Pearson, Joshua, Spathis, Jemima G., van den Hoek, Daniel J., Owen, Patrick J., Weakley, Jonathon and Latella, Christopher. (2020) Effect of competition frequency on strength performance of powerlifting athletes. The Journal of Strength and Conditioning Research. 34(5), pp. 1213 - 1219. https://doi.org/10.1519/JSC.0000000000003563
Structure of force variability during squats performed with an inertial flywheel device under stable versus unstable surfaces
Moras, Gerard, Vázquez-Guerrero, Jairo, Fernández-Valdés, Bruno, Rosas-Casals, Marti, Weakley, Jonathon, Jones, Ben and Sampaio, Jaime. (2019) Structure of force variability during squats performed with an inertial flywheel device under stable versus unstable surfaces. Human Movement Science. 66, pp. 497 - 503. https://doi.org/10.1016/j.humov.2019.05.022
Assessment of the load-velocity profile in the free-weight prone bench pull exercise through different velocity variables and regression models
García-Ramos, Amador, Ulloa-Díaz, David, Barboza-González, Paola, Rodríguez-Perea, Ángela, Martínez-García, Darío, Quidel-Catrilelbún, Mauricio, Guede-Rojas, Francisco, Cuevas-Aburto, Jesualdo, Janicijevic, Danica and Weakley, Jonathon. (2019) Assessment of the load-velocity profile in the free-weight prone bench pull exercise through different velocity variables and regression models. PLoS ONE. 14(2), pp. 1 - 12. https://doi.org/10.1371/journal.pone.0212085
Criterion validity of force and power outputs for a commonly used flywheel resistance training device and bluetooth app
Weakley, Jonathon, Fernández-Valdés, Bruno, Thomas, Liam, Ramirez-Lopez, Carlos and Jones, Ben. (2019) Criterion validity of force and power outputs for a commonly used flywheel resistance training device and bluetooth app. The Journal of Strength and Conditioning Research. 33(5), pp. 1180 - 1184. https://doi.org/10.1519/JSC.0000000000003132
The effects of augmented feedback on sprint, jump, and strength adaptations in rugby union players after a 4-week training program
Weakley, Jonathon, Till, Kevin, Sampson, John Andrew, Banyard, Harry, Leduc, Cédric, Wilson, Kyle M., Roe, Gregory A. B. and Jones, Ben. (2019) The effects of augmented feedback on sprint, jump, and strength adaptations in rugby union players after a 4-week training program. International Journal of Sports Physiology and Performance. 14(9), pp. 1205 - 1211. https://doi.org/10.1123/ijspp.2018-0523
Reliability and validity of different methods of estimating the one-repetition maximum during the free-weight prone bench pull exercise
García-Ramos, Amador, Barboza-González, Paola, Ulloa-Díaz, David, Rodríguez-Perea, Ángela, Martínez-García, Darío, Guede-Rojas, Francisco, Hinojosa-Riveros, Hans, Chirosa-Ríos, Luis Javier, Cuevas-Aburto, Jesualdo, Janicijevic, Danica and Weakley, Jonathon. (2019) Reliability and validity of different methods of estimating the one-repetition maximum during the free-weight prone bench pull exercise. Journal of Sports Sciences. 37(19), pp. 2205 - 2212. https://doi.org/10.1080/02640414.2019.1626071
Organized chaos in late specialization team sports: Weekly training loads of elite adolescent rugby union players
Phibbs, Padraic J., Jones, Ben, Roe, Gregory A. B., Read, Dale B., Darrall-Jones, Joshua David, Weakley, Jonathon, Rock, Andrew and Till, Kevin. (2018) Organized chaos in late specialization team sports: Weekly training loads of elite adolescent rugby union players. The Journal of Strength and Conditioning Research. 32(5), pp. 1316 - 1323. https://doi.org/10.1519/JSC.0000000000001965
The physical characteristics of specific phases of play during rugby union match play
Read, Dale B., Jones, Ben, Williams, Sean, Phibbs, Padraic J., Darrall-Jones, Joshua David, Roe, Gregory A. B., Weakley, Jonathon, Rock, Andrew and Till, Kevin. (2018) The physical characteristics of specific phases of play during rugby union match play. International Journal of Sports Physiology and Performance. 13(10), pp. 1331 - 1336. https://doi.org/10.1123/ijspp.2017-0625
Understanding the relationship between coach and athlete perceptions of training intensity in youth sport
Scantlebury, Sean, Till, Kevin, Sawczuk, Tom, Weakley, Jonathon and Jones, Ben. (2018) Understanding the relationship between coach and athlete perceptions of training intensity in youth sport. The Journal of Strength and Conditioning Research. 32(11), pp. 3239 - 3245. https://doi.org/10.1519/JSC.0000000000002204
The organised chaos of English adolescent rugby union: Influence of weekly match frequency on the variability of match and training loads
Phibbs, Padraic J., Jones, Ben, Roe, Gregory A. B., Read, Dale B., Darrall-Jones, Joshua David, Weakley, Jonathon, Rock, Andrew and Till, Kevin. (2018) The organised chaos of English adolescent rugby union: Influence of weekly match frequency on the variability of match and training loads. European Journal of Sport Science. 18(3), pp. 341 - 348. https://doi.org/10.1080/17461391.2017.1418026
Between-day reliability and usefulness of a fitness testing battery in youth sport athletes: Reference data for practitioners
Sawczuk, Thomas, Jones, Ben, Scantlebury, Sean, Weakley, Jonathon, Read, Dale B., Costello, Nessan, Darrall-Jones, Joshua David, Stokes, Keith A. and Till, Kevin. (2018) Between-day reliability and usefulness of a fitness testing battery in youth sport athletes: Reference data for practitioners. Measurement in Physical Education and Exercise Science. 22(1), pp. 11 - 18. https://doi.org/10.1080/1091367X.2017.1360304
Bigger, stronger, faster, fitter: The differences in physical qualities of school and academy rugby union players
Jones, Ben, Weaving, Dan, Tee, Jason, Darrall-Jones, Joshua David, Weakley, Jonathon, Phibbs, Padraic J., Read, Dale B., Roe, Gregory A. B., Hendricks, Sharief and Till, Kevin. (2018) Bigger, stronger, faster, fitter: The differences in physical qualities of school and academy rugby union players. Journal of Sports Sciences. 36(21), pp. 2399 - 2404. https://doi.org/10.1080/02640414.2018.1458589
Validity of daily and weekly self-reported training load measures in adolescent athletes
Phibbs, Padraic J., Roe, Gregory, Jones, Ben, Read, Dale B., Weakley, Jonathon, Darrall-Jones, Joshua and Till, Kevin. (2017) Validity of daily and weekly self-reported training load measures in adolescent athletes. The Journal of Strength and Conditioning Research. 31(4), pp. 1121 - 1126. https://doi.org/10.1519/JSC.0000000000001708
Movement and physical demands of school and university rugby union match-play in England
Read, Dale, Weaving, Daniel, Phibbs, Padraic, Darrall-Jones, Joshua, Roe, Gregory, Weakley, Jonathon, Hendricks, Sharief, Till, Kevin and Jones, Ben. (2017) Movement and physical demands of school and university rugby union match-play in England. BMJ Open Sport & Exercise Medicine. 2(1), pp. 1 - 7. https://doi.org/10.1136/bmjsem-2016-000147
The effect of physical contact on changes in fatigue markers following rugby union field-based training
Roe, Gregory, Darrall-Jones, Joshua, Till, Kevin, Phibbs, Padraic, Read, Dale, Weakley, Jonathon, Rock, Andrew and Jones, Ben. (2017) The effect of physical contact on changes in fatigue markers following rugby union field-based training. European Journal of Sport Science. 17(6), pp. 647 - 655. https://doi.org/10.1080/17461391.2017.1287960
To jump or cycle? Monitoring neuromuscular function in rugby union players
Roe, Gregory, Darrall-Jones, Joshua, Till, Kevin, Phibbs, Padraic J., Read, Dale, Weakley, Jonathon and Jones, Ben. (2017) To jump or cycle? Monitoring neuromuscular function in rugby union players. International Journal of Sports Physiology and Performance. 12(5), pp. 690 - 696. https://doi.org/10.1123/ijspp.2016-0273
The effect of body mass on the 30-15 intermittent fitness test in rugby union players
Darrall-Jones, Joshua David, Roe, Gregory A. B., Carney, Shane, Clayton, Ryan, Phibbs, Padraic J., Read, Dale B., Weakley, Jonathon, Till, Kevin and Jones, Ben. (2016) The effect of body mass on the 30-15 intermittent fitness test in rugby union players. International Journal of Sports Physiology and Performance. 11(3), pp. 400 - 403. https://doi.org/10.1123/ijspp.2015-0231
Between-days reliability and sensitivity of common fatigue measures in rugby players
Roe, Gregory A. B., Darrall-Jones, Joshua David, Till, Kevin, Phibbs, Padraic J., Read, Dale B., Weakley, Jonathon and Jones, Ben. (2016) Between-days reliability and sensitivity of common fatigue measures in rugby players. International Journal of Sports Physiology and Performance. 11(5), pp. 581 - 586. https://doi.org/10.1123/ijspp.2015-0413