Intra- and inter-session reliability of countermovement jump and gait analysis in collegiate athletes measured using an inertial measurement unit (BTS G-Walk)

Rohit K. Thapa; Gopal Kumar; Gaurav Kundu; Preeti Yadav; Andrew Sortwell; Rodrigo Ramirez-Campillo

Rohit K. Thapa^1,2, Gopal Kumar³, Gaurav Kundu³, Preeti Yadav³, Andrew Sortwell^4,5, Rodrigo Ramirez-Campillo⁶

¹Symbiosis School of Sports Sciences, Symbiosis International (Deemed University), Pune, India
²School of Physical Education and Sports, Rashtriya Raksha University, Gandhinagar, India
³Department of Exercise Physiology, Lakshmibai National Institute of Physical Education, Gwalior, India
⁴School of Health Sciences and Physiotherapy, University of Notre Dame Australia, Sydney, Australia
⁵Research Centre in Sports Sciences, Health Sciences and Human Development, Covilhã, Portugal
⁶Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile

Intra- and inter-session reliability of countermovement jump and gait analysis in collegiate athletes measured using an inertial measurement unit (BTS G-Walk)

Monten. J. Sports Sci. Med. 2024, 13(2), 37-47 | DOI: 10.26773/mjssm.240905

Abstract

This study assessed the intra- and inter-session reliability of the inertial measurement unit (IMU) in measuring countermovement jump (CMJ) and 10m-walking gait-related outcomes. Thirty collegiate-level athletes (15 males [age: 21.0 ± 2.5 years] and 15 females [age: 21.5 ± 2.1 years]) were recruited to perform CMJs and 10m-walking test that were simultaneously recorded using the commercially available body-worn IMU – BTS G-walk. The coefficient of variation (CV), the analysis of variance with repeated measures (ANOVA), and the interclass correlation coefficient (ICC) were used for intra-session reliability. While the Pearson’s correlation coefficient (r) and the ICC were used to analyze inter-session reliability. Measurement of CMJ and 10m-walking test gait variables using the IMU resulted in moderate to excellent intra-session reliability for CMJ (ICC = 0.881 to 0.988) and gait analysis (ICC = 0.807 to 0.978) with acceptable CV (≤10%). Inter-session reliability for CMJ variables ranged from poor to excellent (ICC = 0.134 to 0.963), and 10-m walking test gait analysis variables were moderate to excellent (ICC = 0.683 to 0.931). The IMU (BTS G-walk) provides reliable data for most CMJ and gait variables. Future studies may determine the accuracy of the equipment to monitor changes over time (e.g., after a training intervention).

Keywords

Plyometric exercise, athletic performance, exercise, sports medicine, athletic performance, human movement

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