Leg extensions are one of the most effective exercises for isolating the quadriceps. Unlike compound movements like squats or lunges, the leg extension machine specifically targets the knee joint, ...

a) Lean forward on a table, resting on your elbows with your tummy tucked in. Kick your right leg back and up, leg slightly bent, heel towards the ceiling, hold and lower. b) Now with your right leg ...

Sit in a leg extension machine with your ankles against the lower pad. Use your quad to push forward and straighten your leg in front of you, then return to the start position and repeat on the other ...