Evaluation of the Vmaxpro sensor for assessing movement velocity and load-velocity variables: accuracy and implications for practical use

Boris Dragutinovic; Mats Jacobs; Joshua Feuerbacher; Jan-Peter Goldmann; Sulin Cheng; Moritz Schumann

doi:10.5114/biolsport.2024.125596

eISSN: 2083-1862
ISSN: 0860-021X

Biology of Sport

Current Issue Manuscripts accepted About the journal Editorial board Abstracting and indexing Archive Ethical standards and procedures Contact Instructions for authors Journal's Reviewers Special Information

Editorial System

Submit your Manuscript

Editorial Policies

Sarajevo Declaration on Integrity and Visibility of Scholarly Publications

Open access

1/2024
vol. 41

Send email

Copy url:

abstract:

Original paper

Evaluation of the Vmaxpro sensor for assessing movement velocity and load-velocity variables: accuracy and implications for practical use

Boris Dragutinovic

¹

,

Mats W. Jacobs

¹

,

Joshua F. Feuerbacher

¹

,

Jan-Peter Goldmann

^{2, 3}

,

Sulin Cheng

^{4, 5, 6}

,

Moritz Schumann

^{1, 4, 5, 7}

Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University, Cologne, Germany
Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany
German Research Centre of Elite Sport Cologne, Cologne, Germany
Department of Physical Education, Exercise, Health and Technology Centre, Shanghai Jiao Tong University, Shanghai, China
Exercise Translational Medicine Centre, Shanghai Centre for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
Division of Training and Movement Science, University of Potsdam, Potsdam, Germany

Biol Sport. 2024;41(1):41–51

DOI: https://doi.org/10.5114/biolsport.2024.125596

Online publish date: 2023/05/25

View full text Get citation

PlumX metrics:

We investigated the ecological validity of an inertial measurement unit (IMU) (Vmaxpro) to assess the movement velocity (MV) during a 1-repetition maximum (1RM) test and for the prediction of load-velocity (L-V) variables, as well as the ecological intra-day and inter-day reliability during free-weight bench press (BP) and squat (SQ). Furthermore, we provide recommendations for the practical use of the sensor. Twenty-three strength-trained men completed an incremental 1RM test, whereas seventeen men further participated in another 3 sessions consisting of 3 repetitions with 4 different loads (30, 50, 70 and 90% of 1RM) to assess validity and intra- and inter‑day reliability, respectively. The MV was assessed using the Vmaxpro and a 3D motion capture system (MoCap). L-V variables and the 1RM were calculated based on submaximal velocities. The Vmaxpro showed high validity during the 1RM test for BP (r = 0.935) and SQ (r = 0.900), but with decreasing validity at lower MVs. The L-V variables and the 1RM demonstrated high validity for BP (r = 0.808–0.942) and SQ (r = 0.615–0.741) with a systematic overestimation. Coefficients of variance for intra- and inter-day reliability ranged from 2.4% to 9.7% and from 3.2% to 8.6% for BP and SQ, respectively. The Vmaxpro appears valid at high and moderately valid at low MVs. Depending on the required degree of accuracy, the sensor may be sufficient for the prediction of L-V variables and the 1RM. Our data indicate the sensor to be suitable for monitoring changes in MVs within and between training sessions.

keywords:

Evaluation of the Vmaxpro sensor for assessing movement velocity and load-velocity variables: accuracy and implications for practical use

Boris Dragutinovic 1 , Mats W. Jacobs 1 , Joshua F. Feuerbacher 1 , Jan-Peter Goldmann 2, 3 , Sulin Cheng 4, 5, 6 , Moritz Schumann 1, 4, 5, 7

validity, reliability, velocity-based training, inertial measurement unit, strength training

Boris Dragutinovic

¹

,

Mats W. Jacobs

¹

,

Joshua F. Feuerbacher

¹

,

Jan-Peter Goldmann

^{2, 3}

,

Sulin Cheng

^{4, 5, 6}

,

Moritz Schumann

^{1, 4, 5, 7}