Background: Advances in technology have resulted in an increase in the utilization of velocity-based training in the strength and conditioning field while utilization of inertia measurement units (IMUs) shows promise. Methods: Recreationally trained participants (N=25, 28.3 ± 2.9 years) were recruited to determine the validity of the VmaxPro device for measuring performance variables in the back squat and countermovement jump (CMJ) against a gold standard force plate. Squat variables assessed included mean concentric velocity (MCV), mean concentric power (MCP), depth, and duration while CMJ variables assessed included MCV, MCP, depth, duration, and jump height. Squat variables were assessed across 3 conditions: BW, 50% BW, and 100% BW. Results: MCV demonstrated strong correlations in the BW, 50% and 100% conditions (r= 0.965; r=.907; r= 0.827, pp pConclusion:The VmaxPro is a reasonably valid device for assessing duration and jump height when assessing CMJ performance as compared to the force plate while demonstrating overestimation bias. For back squat performance variables, the VmaxPro proves as a reasonably valid device for assessing MCV, MCP, depth, and duration while demonstrating overestimation bias in MCV and MCP.
","abstract_html":"<p><strong>Background: </strong>Advances in technology have resulted in an increase in the utilization of velocity-based training in the strength and conditioning field while utilization of inertia measurement units (IMUs) shows promise. <strong>Methods: </strong>Recreationally trained participants (N=25, 28.3 ± 2.9 years) were recruited to determine the validity of the VmaxPro device for measuring performance variables in the back squat and countermovement jump (CMJ) against a gold standard force plate. Squat variables assessed included mean concentric velocity (MCV), mean concentric power (MCP), depth, and duration while CMJ variables assessed included MCV, MCP, depth, duration, and jump height. Squat variables were assessed across 3 conditions: BW, 50% BW, and 100% BW. <strong>Results: </strong>MCV demonstrated strong correlations in the BW, 50% and 100% conditions (r= 0.965; r=.907; r= 0.827, <em>p</em>p pConclusion:The VmaxPro is a reasonably valid device for assessing duration and jump height when assessing CMJ performance as compared to the force plate while demonstrating overestimation bias. For back squat performance variables, the VmaxPro proves as a reasonably valid device for assessing MCV, MCP, depth, and duration while demonstrating overestimation bias in MCV and MCP.</p>","abstract_has_math":false,"creators":["Haynes, Hunter"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Masters Thesis","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Dr. Riley Galloway","Dr. Paul Donahue","Dr. Nuno Oliveira"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-05-01T07:00:00Z","date_published":"2022-05-01T07:00:00Z","updated_at":"2026-07-24T05:45:33Z","subjects":["VmaxPro","validity","Countermovement jump","Squat","Mean Concentric Velocity","Jump Height","Biomechanics","Exercise Science","Kinesiology"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://aquila.usm.edu/masters_theses/888","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Dr. Riley Galloway","Dr. Paul Donahue","Dr. Nuno Oliveira"]},{"key":"dc:creator","label":"Author","values":["Haynes, Hunter"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2022-05-15T07:00:00Z"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["VmaxPro","validity","Countermovement jump","Squat","Mean Concentric Velocity","Jump Height","Biomechanics","Exercise Science","Kinesiology"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://aquila.usm.edu/masters_theses/888"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Background: Advances in technology have resulted in an increase in the utilization of velocity-based training in the strength and conditioning field while utilization of inertia measurement units (IMUs) shows promise. Methods: Recreationally trained participants (N=25, 28.3 ± 2.9 years) were recruited to determine the validity of the VmaxPro device for measuring performance variables in the back squat and countermovement jump (CMJ) against a gold standard force plate. Squat variables assessed included mean concentric velocity (MCV), mean concentric power (MCP), depth, and duration while CMJ variables assessed included MCV, MCP, depth, duration, and jump height. Squat variables were assessed across 3 conditions: BW, 50% BW, and 100% BW. Results: MCV demonstrated strong correlations in the BW, 50% and 100% conditions (r= 0.965; r=.907; r= 0.827, pp pConclusion:The VmaxPro is a reasonably valid device for assessing duration and jump height when assessing CMJ performance as compared to the force plate while demonstrating overestimation bias. For back squat performance variables, the VmaxPro proves as a reasonably valid device for assessing MCV, MCP, depth, and duration while demonstrating overestimation bias in MCV and MCP.
"]},{"key":"dc:title","label":"Title","values":["The Validity of The VmaxPro during Countermovement Jump and Back Squat Performance"]}]}],"canonical_facts":{"dc:contributor":["Dr. Riley Galloway","Dr. Paul Donahue","Dr. Nuno Oliveira"],"dc:creator":["Haynes, Hunter"],"dc:date.available":["2022-05-15T07:00:00Z"],"dc:description.abstract":["Background: Advances in technology have resulted in an increase in the utilization of velocity-based training in the strength and conditioning field while utilization of inertia measurement units (IMUs) shows promise. Methods: Recreationally trained participants (N=25, 28.3 ± 2.9 years) were recruited to determine the validity of the VmaxPro device for measuring performance variables in the back squat and countermovement jump (CMJ) against a gold standard force plate. Squat variables assessed included mean concentric velocity (MCV), mean concentric power (MCP), depth, and duration while CMJ variables assessed included MCV, MCP, depth, duration, and jump height. Squat variables were assessed across 3 conditions: BW, 50% BW, and 100% BW. Results: MCV demonstrated strong correlations in the BW, 50% and 100% conditions (r= 0.965; r=.907; r= 0.827, pp pConclusion:The VmaxPro is a reasonably valid device for assessing duration and jump height when assessing CMJ performance as compared to the force plate while demonstrating overestimation bias. For back squat performance variables, the VmaxPro proves as a reasonably valid device for assessing MCV, MCP, depth, and duration while demonstrating overestimation bias in MCV and MCP.
"],"dc:identifier":["https://aquila.usm.edu/masters_theses/888"],"dc:subject":["VmaxPro","validity","Countermovement jump","Squat","Mean Concentric Velocity","Jump Height","Biomechanics","Exercise Science","Kinesiology"],"dc:title":["The Validity of The VmaxPro during Countermovement Jump and Back Squat Performance"],"thesis:degree_level":["Masters Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T05:45:33Z"}