Description of trunk motion. Trunk forward inclination was measured as

Utility of 2D Video Analysis for Assessing Frontal Plane Trunk and Pelvis Motion during Stepping, Landing, and Change in Direction Tasks: A Validity Study

IJERPH, Free Full-Text

Journal of Musculoskeletal Science and Technology

Assessment of trunk flexion in arm reaching tasks with electromyography and smartphone accelerometry in healthy human subjects

Figure 2 from An accelerometer-based festinating gait detection algorithm and its application to Parkinson's Disease development

Characteristics and usefulness of trunk muscle endurance tests on the Roman chair in healthy adults [PeerJ]

Hirofumi IDA, Professor (Full), Ph.D., Jobu University, Department of Sports and Health Management

Pelvic Tilt - Physiopedia

Forward trunk

Three-dimensional kinematic analysis of throwing motion focusing on pelvic rotation at stride foot contact - ScienceDirect

The Real Science of the Squat – Squat University