Leg extensions are a great exercise for isolating the quad muscles. These make a great accessory lift to squats and leg press. You can perform these one or two legs at a time.
Positioning: Back should be straight and you should be seated on the machine. Legs should be hanging below. Adjust the seat as needed and the height of the foot pad rest should be at your shins.
Performing the exercise: Lift the weight while remaining seated. Have a slight pause at the top of the exercises and slowly return the weight to the starting position.
What not to do! :
- Swing your body
- Lift yourself from the seat