The Validity and Reliability of the My Jump Lab App for the Measurement of Vertical Jump Performance Using Artificial...

Area of Science:

• Sports Science
• Biomechanics
• Human Movement Analysis

Background:

• The countermovement jump (CMJ) is a key indicator of lower body neuromuscular function.
• Accurate measurement of CMJ performance is crucial for athletic assessment and training.
• Existing measurement tools like force plates can be costly and lack portability.

Purpose of the Study:

• To evaluate the validity and reliability of the My Jump Lab iOS application for measuring CMJ performance.
• To compare the AI-driven app's measurements against traditional force platforms.
• To assess the app's accuracy under various loading conditions (0-70% body mass).

Main Methods:

• Twelve physically active participants performed CMJs under loaded and unloaded conditions.
• CMJ data was simultaneously collected using force platforms and the My Jump Lab application.
• Validity was assessed by comparing measurements between the two devices.
• Reliability was determined using Cronbach's alpha and coefficient of variation.

Main Results:

• High correlation (r > 0.91) was found between the app and force platforms for CMJ height, force, velocity, and power.
• Minimal and non-significant differences were observed across most loading conditions.
• Excellent reliability was demonstrated for both the app and force platforms (Cronbach's α > 0.93, CV < 6%).

Conclusions:

• The My Jump Lab application is a valid and reliable tool for assessing CMJ performance.
• The app provides accurate measurements of jump height, force, velocity, and power.
• This AI-powered mobile solution offers a cost-effective and portable alternative to force plates for neuromuscular assessment.