How it is done:

1. Sit on machine with ankles behind pad. Make sure knees are aligned with machine's axix of rotation.
2. Straighten legs in a smooth manner until knees are almost locked.
3. Lower to starting position, stopping just before the bottom. Repeat.

Muscles Emphasized:

Quadriceps

Breathing:

Exhale as you extend legs upward. Inhale as you lower legs to starting position.

Trainer's Tips:

• Alternatively try this exercise using one leg at a time.
• Perform this exercise slowly so that your quadricep muscles are fully stressed.

Common Mistakes:

• Locking legs when fully extended.
• Flexing or extending feet.