Abstract
The aim of the present study was to determine if an inertial measurement unit placed on the metatarsal part of the foot can provide valid and reliable data for an accurate estimate of vertical jump height. Thirteen female volleyball players participated in the study. All players were members of the Republic of Serbia national team. Measurement of the vertical jump height was performed for the two exemplary jumping tasks, squat jump and counter-movement jump. Vertical jump height estimation was performed using the flight time method for both devices. The presented results support a high level of concurrent validity of an inertial measurement unit in relation to a force plate for estimating vertical jump height (CMJ t = 0.897, p = 379; ICC = 0.975; SQJ t = −0.564, p = 0.578; ICC = 0.921) as well as a high level of reliability (ICC > 0.872) for inertial measurement unit results. The proposed inertial measurement unit positioning may provide an accurate vertical jump height estimate for in-field measurement of jump height as an alternative to other devices. The principal advantages include the small size of the sensor unit and possible simultaneous monitoring of multiple athletes.
Highlights
The vertical jump (VJ) is a complex task that requires the coordination of multiple joints [1]
This paper proposes an implementation of a custom-made inertial measurement units (IMU) placed on the distal area of the metatarsal part of the foot for VJ height estimation using the flight time (FT) method
The results of jump height (JH) from force plate (FP) data were in the range of 24.83 to 38.32 cm, with the coefficient of variation
Summary
The vertical jump (VJ) is a complex task that requires the coordination of multiple joints [1] It is characterized by a rapid vertical acceleration of the body mass in the shortest possible time interval and was found to be related to common sports activities, such as sprint, acceleration and change of direction speed (CODS) [2,3,4]. The jump modalities that are most widely used in testing are the counter-movement jump (CMJ) and the squat jump (SQJ). The former utilizes the characteristics of the muscle stretch-shortening cycle (SSC) more closely resembling a real-world jumping task while the focus of the latter is the isolated concentric phase of muscle action [7,8,9].
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