DOI
https://doi.org/10.25035/jsmahs.11.02.07
Abstract
Introduction: This study assessed the validity of a non-immersive body motion tracking system (TRAZER) as an alternative to using Inertial Measurement Units (IMU)-based motion capture (MyoMotion) for lower extremity kinematic analysis. Methods: Twenty healthy participants (10 females, 10 males) with a mean age of 24.03 years (range: 20-33 years) and a mean BMI of 25.15 kg/m² (range: 18.45-32.23 kg/m²) performed double and single-leg squats. Data Analysis: Kinematic data from TRAZER and MyoMotion IMUs were compared using a mixed two-way ANOVA. Results: No significant differences were observed in knee flexion data across all movements (p > 0.05) and knee abduction during the left single-leg squat (p = 0.855). However, significant differences were noted for knee abduction in the double-leg squats (p < 0.001) and in the right single leg squat (p = 0.03) and ankle dorsiflexion across all movements (p < 0.001). Discussion: These results suggest that while TRAZER is suitable for gross movement assessment, it may not yet serve as a substitute for more precise clinical measurements.
Figure 1
Figure 2- Sample Data from MyoMotion.png (236 kB)
Figure 2
Figure 3- Sensor Placement, Bodyweight Squat, Single-Leg Squat (Left to Right).png (412 kB)
Figure 3
Figure 4- Knee Flexion Data.png (22 kB)
Figure 4
Figure 5- Tibial Abduction (Valgum) Data.png (18 kB)
Figure 5
Figure 6-Ankle Dorsiflexion Data.png (21 kB)
Figure 6
Recommended Citation
Juoza-Clark, Gabriella SPT; Carter, JoEllen SPT; Stam, Nikki SPT; and Robinson, Kevin PT, DSc, OCS
(2025)
"Comparing Lower Extremity Kinematics using TRAZER and Inertial Motion Capture Systems,"
Journal of Sports Medicine and Allied Health Sciences: Official Journal of the Ohio Athletic Trainers Association: Vol. 11:
Iss.
2, Article 7.
DOI: https://doi.org/10.25035/jsmahs.11.02.07
Available at:
https://scholarworks.bgsu.edu/jsmahs/vol11/iss2/7
Included in
Biomechanics Commons, Exercise Science Commons, Motor Control Commons, Musculoskeletal System Commons, Orthopedics Commons, Other Kinesiology Commons, Other Rehabilitation and Therapy Commons, Physical Therapy Commons, Physiotherapy Commons, Preventive Medicine Commons, Primary Care Commons, Sports Medicine Commons, Sports Sciences Commons, Therapeutics Commons