Which exercise targets the quadriceps?

• A. Leg extensions
• B. Hamstring curls
• C. Calf raises
• D. Deadlifts

Answer: (A)

Leg extensions specifically emphasize knee extension against resistance, which directly targets the quadriceps that run down the front of the thigh. On a leg extension machine, the knee joint does most of the work as you straighten your leg, isolating the quadriceps (the muscles that straighten the knee).

In contrast, hamstring curls hinge at the knee to bend it, so they recruit the hamstrings; calf raises lift through the ankle to work the calf muscles; and deadlifts involve a hip hinge and recruit multiple muscles, including the glutes and hamstrings, with less isolation of the quadriceps.

So, for direct quadriceps engagement, leg extensions are the best choice.