Jump height from inertial recordings: A tutorial for a sports scientist

Area of Science:

• Biomechanics
• Sports Science
• Wearable Technology

Background:

• Jump performance assessment is crucial for sports and clinical applications.
• Current methods are often laboratory-bound, limiting real-world applicability.
• There is a need for accessible, out-of-laboratory jump performance measurement tools.

Purpose of the Study:

• To evaluate a novel analytical approach for estimating jump height using inertial recording units (IMUs).
• To minimize bias between IMU-based and traditional jump mat jump height measurements.
• To provide a standardized tutorial for sport scientists to facilitate jump height estimation.

Main Methods:

• Forty-one participants (ages 6-77) performed maximal countermovement jumps.
• Jump height was concurrently measured using a jump mat and an IMU placed on the lower lumbar region.
• A novel analytical approach was applied to IMU data for jump height estimation.

Main Results:

• Excellent agreement was found between IMU-based and jump mat jump height measurements (ICC = 0.97).
• The mean bias between the two methods was negligible (-0.1 cm).
• The intra-class correlation coefficient demonstrated high reliability and consistency.

Conclusions:

• Lightweight IMUs worn on the hip provide a valid and feasible method for assessing jump height across diverse populations.
• Inertial recordings offer potential for semi-automated analysis with low labor costs.
• This technology is suitable for applied settings like professional sports and clinical environments.