Leg Extentions:

Read all the instructions on the leg extention machine before doing the exercise. Generally, position the back and foot adjustment to your body size. The foot pad should be positioned for maximum leverage, so that it is placed right above your foot. Sit on the seat pad, and put your feet under the foot pad. Grab the handles with your hands to keep yourself in position. Engage your abs. Keep chest out and shoulders back. Inhale.

Raise your feet to raise the mechanism. Raise until your legs are almost fully extended, but never so much that lock your knees.  When your legs are extended, pause, squeeze your quadraceps (thigh muscles) and exhale. Return to the start. Repeat for reps.

Leg Exercises:
Barbell Calf Raise	Hack Squat	Romanian Dead Lift
Butt Blaster	Inner Hip Adduction	Seated Calf Raise
Donkey Calf Raise	Outer Hip Adduction	Seated Leg Curl
Dumbell Calf Raise	Leg Extentions	Side Lunge
Dumbell Lunge	Leg Press	Squat
Dumbell Romanian Dead Lift	Leg Press Calf Raise	Standing Calf Raise
Dumbell Squat	Lunge	Standing Leg Curl
Front Squat	Lying Leg Curl	Step Ups
Goose Step	Reverse Leg Curl