A July 2025 study published in the Journal of Sports Sciences evaluated the reliability of Theia3D’s markerless motion capture system for assessing lower-limb and trunk kinematics during sprint running. Researchers compared Theia3D against a marker-based optical reference system (Motion Analysis Corp. Raptor) across multiple sprint phases, including early acceleration, mid-acceleration, and top speed. Results showed good to excellent agreement between systems for most joints and movement phases, with some variability at top speed, particularly in pelvic and foot angles. The findings highlight both the promise and the challenges of measuring sprint mechanics with markerless motion capture in high-speed, real-world conditions.

A new study from Liverpool John Moores University (LJMU) compared traditional marker-based gait analysis with Theia3D’s markerless motion capture in typically developing children aged 6-13 years. The findings reinforce that markerless systems like Theia3D can deliver biomechanically meaningful data in pediatric populations while reducing preparation time and participant burden, important steps toward broader clinical adoption.

Researchers from Universidade de Lisboa and KU Leuven set out to evaluate the construct validity of Theia3D markerless motion capture for 3D gait analysis in healthy community-dwelling adults aged 65 and older. Their findings offer strong support for Theia3D’s use in real-world aging populations, especially for sagittal-plane kinematics and kinetics.