Monitoring Bar Velocity to Quantify Fatigue in Resistance Training

Abstract: We analyzed the effects of load magnitude and bar velocity variables on sensitivity to fatigue. Seventeen resistance-trained men (age=25.7±4.9 years; height=177.0±7.2 cm; body mass=77.7±12.3 kg; back-squat 1RM=145.0±33.9 kg; 1RM/body mass=1.86) participated in the study. Pre- and post-exercise changes in the mean propulsive velocity (MPV) and peak velocity (PV) in the back-squat at different intensities were compared with variations in the countermovement jump (CMJ). CMJ height decreased significantly from pre- to post-exercise (∆%=−7.5 to −10.4; p<0.01; ES=0.37 to 0.60). Bar velocity (MPV and PV) decreased across all loads (∆%=−4.0 to −12.5; p<0.01; ES=0.32 to 0.66). The decrease in performance was similar between the CMJ, MPV (40% and 80% 1RM; p=1.00), and PV (80% 1RM; p=1.00). The magnitude of reduction in CMJ performance was greater than MPV (60% 1RM; p=0.05) and PV (40% and 60% 1RM; p<0.01) at the post-exercise moment. Low systematic bias and acceptable levels of agreement were only found between CMJ and MPV at 40% and 80% 1RM (bias=0.35 to 1.59; ICC=0.51 to 0.71; CV=5.1% to 8.5%). These findings suggest that the back-squat at 40% or 80% 1RM using MPV provides optimal sensitivity to monitor fatigue through changes in bar velocity.

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• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Monitoring Bar Velocity to Quantify Fatigue in Resistance Training ; volume:45 ; number:08 ; year:2024 ; pages:624-632 ; International journal of sports medicine ; 45, Heft 08 (2024), 624-632

Contributors, Places and Time

• Contributor: Moura, Raony Espíndola ; Bezerra da Silva, Rodrigo Fabio ; Gomes, Lucas Morais de Souza ; Ramos da Silva, José Leonardo ; Henrique, Rafael dos Santos ; Sousa, Filipe Antônio de Barros ; Fonseca, Fabiano de Souza

Further information

• DOI: 10.1055/a-2316-7966
• URN: urn:nbn:de:101:1-2408221108268.592526740482
• Rights: Kein Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.