Validity and effects of placement of velocity-based training devices

Fritschi, Raphael; Seiler, Jan; Gross, Micah (2021). Validity and effects of placement of velocity-based training devices Sports, 9(9), pp. 1-15. MDPI 10.3390/sports9090123

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Velocity-based training (VBT) is a resistance training method by which training variables are manipulated based on kinematic outcomes, e.g., barbell velocity. The better precision for monitoring and manipulating training variables ascribed to VBT assumes that velocity is measured and communicated correctly. This study assessed the validity of several mobile and one stationary VBT device for measuring mean and peak concentric barbell velocity over a range of velocities and exercises, including low- and high-velocity, ballistic and non-ballistic, and plyometric and non-plyometric movements, and to quantify the isolated effect of device attachment point on measurement validity. GymAware (r = 0.90-1, standard error of the estimate, SEE = 0.01-0.08 m/s) and Quantum (r = 0.88-1, SEE = 0.01-0.18 m/s) were most valid for mean and peak velocity, with Vmaxpro (r = 0.92-0.99, SEE = 0.02-0.13 m/s) close behind. Push (r = 0.69-0.96, SEE = 0.03-0.17 m/s) and Flex (r = 0.60-0.94, SEE = 0.02-0.19 m/s) showed poorer validity (especially for higher-velocity exercises), although typical errors for mean velocity in exercises other than hang power snatch were acceptable. Effects of device placement were detectable, yet likely small enough (SEE < 0.1 m/s) to be negligible in training settings.

Item Type:

Journal Article (Original Article)

Division/Institute:

Swiss Federal Institute of Sports Magglingen SFISM > EHSM - Leistungssport > Sportphysiologie Kraft

Name:

Fritschi, Raphael;
Seiler, Jan and
Gross, Micah

ISSN:

2075-4663

Publisher:

MDPI

Language:

English

Submitter:

Admin import user

Date Deposited:

23 May 2022 14:17

Last Modified:

23 May 2022 14:17

Publisher DOI:

10.3390/sports9090123

PubMed ID:

34564328

Uncontrolled Keywords:

Accuracy Barbell kinematics Inertial measurement unit (IMU) Laser Linear position transducer Precision Resistance training Velocity

ARBOR DOI:

10.24451/arbor.16836

URI:

https://arbor.bfh.ch/id/eprint/16836

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