Forward Lunge
Biomechanical analysis of forward lunge movements, including events, phases, and discrete metrics.
Overview
The forward lunge is a fundamental movement assessment that evaluates an athlete’s ability to perform a stepping motion with proper form and stability. This movement is commonly used in athletic assessment and training as it provides valuable information about lower extremity strength, balance, and movement patterns.Instructions
Dimensions
Required inputs for processing:- Arm Position: [‘arm-swing’,‘hands-on-hips’]
Events
| Metric | Data Type | Description | Column Name |
|---|---|---|---|
| Initiation | Int | the start of the lunge | lunge_initiation_frame |
| Bottom | Int | when the front foot leaves the ground | lunge_bottom_frame |
| Termination | Int | the end of the movement | lunge_end_frame |
Phases and Stages of the Lunge
| Phase | Stage | Start | End | Event or Phase |
|---|---|---|---|---|
| Preparation | Step Forward | Initiation | Front Foot Contact | Phase |
| Loading | Descent | Front Foot Contact | Peak Knee Flexion | Phase |
| Loading | Ascent | Peak Knee Flexion | Front Foot Lift | Phase |
| Recovery | Step Back | Front Foot Lift | Termination | Phase |
Discrete Metrics
| Metric | Data Type | Units | Description | Column Name |
|---|---|---|---|---|
| Step Length | Float | meters | Distance between feet at front foot contact | “ |
| Knee Flexion | Float | degrees | Maximum knee flexion of front leg | “ |
| Right Valgus Bottom | Float | meters | Right knee valgus at bottom position | right_knee_valgus_at_bottom |
| Left Valgus Bottom | Float | meters | Left knee valgus at bottom position | left_knee_valgus_at_bottom |
| Right Valgus Landing | Float | meters | Right knee valgus at landing | right_knee_valgus_at_landing |
| Left Valgus Landing | Float | meters | Left knee valgus at landing | left_knee_valgus_at_landing |
| Right Valgus Landing Bottom | Float | meters | Right knee valgus at landing bottom | right_knee_valgus_at_landing_bottom |
| Left Valgus Landing Bottom | Float | meters | Left knee valgus at landing bottom | left_knee_valgus_at_landing_bottom |
| Right Valgus Landing Full | Float | meters | Maximum right knee valgus during landing | right_knee_valgus_full_landing |
| Left Valgus Landing Full | Float | meters | Maximum left knee valgus during landing | left_knee_valgus_full_landing |
| Right Eccentric Hip Knee Dominance | Float | ratio | Right hip-knee dominance during eccentric phase (0=hip dominant, 1=knee dominant) | right_eccentric_hip_knee_dominance |
| Left Eccentric Hip Knee Dominance | Float | ratio | Left hip-knee dominance during eccentric phase (0=hip dominant, 1=knee dominant) | left_eccentric_hip_knee_dominance |
| Right Concentric Hip Knee Dominance | Float | ratio | Right hip-knee dominance during concentric phase (0=hip dominant, 1=knee dominant) | right_concentric_hip_knee_dominance |
| Left Concentric Hip Knee Dominance | Float | ratio | Left hip-knee dominance during concentric phase (0=hip dominant, 1=knee dominant) | left_concentric_hip_knee_dominance |
Notes
- Kinematic data typically captured at 60Hz for Lunging