Eccentryx / Exercise Atlas / legs
Leg extension (3s eccentric)
Pad just above ankles, back flat, knee joint aligned with machine pivot.
Muscles
- Primary
- quads
- Supporting
- None listed
Mechanics
- Pattern
- machine squat
- Equipment
- machine
- Geometry
- 90° Alignment
- Energy model
- Glycolytic Pathway (10-90s)
- Target feel
- Quad fires to full extension at the top; control the 3-second descent.
- Progression
- Add load only after the 3-second eccentric is fully controlled.
- Regression
- Reduce range of motion or switch to wall sit.
Watch for
- Jerking to initiate
- Cutting the eccentric short
- Hip flexor driving the pad
Substitutions
- Wall sit
- Bulgarian split squat
- Single-leg leg press