Timing in Lower Limb Complex Movement Tests for DanceSport Athletes: Relation between FitLight Trainer and IMU...

Area of Science:

• Sports Science
• Biomechanics
• Human Movement Analysis

Background:

• Accurate measurement of movement timing is crucial for evaluating athletic performance in DanceSport.
• Existing methods for timing assessment in lower limb movements may have limitations in precision or practicality.
• The FitLight Trainer device is considered a gold standard for timing measurements in this field.

Purpose of the Study:

• To evaluate the concurrent validity of an Inertial Measurement Unit (IMU) against the FitLight Trainer for measuring timing in lower limb complex movement tests.
• To determine the suitability of IMU sensors as a portable and accurate alternative for sports timing applications.

Main Methods:

• Concurrent validity was assessed by comparing measurements from an IMU and a FitLight Trainer.
• Four specific lower limb movement tests were selected for DanceSport.
• Twenty-one experienced dancers performed the tests using each lower limb, with both devices recording data simultaneously.

Main Results:

• The IMU demonstrated excellent agreement with the FitLight Trainer in estimating total test run times.
• Interclass correlation coefficients (ICCs) ranged from 0.967 to 0.994 across all tests, indicating high reliability.
• Bland-Altman plots visually confirmed the strong agreement between the two measurement devices.

Conclusions:

• Inertial Measurement Units (IMUs) are precise and suitable devices for measuring timing in sports.
• IMUs offer advantages in mobility, light weight, and size compared to other timing devices.
• The findings support the use of IMU sensors as a viable alternative for timing assessments in DanceSport and other athletic activities.