Which muscle is involved in plantar flexion and commonly trained with calf raises?

• A. Gastrocnemius
• B. Rectus Abdominis
• C. Tibialis Anterior
• D. Deltoid

Answer: (A)

Plantar flexion is the movement that points the toes downward, like standing on tiptoes. The gastrocnemius is the primary calf muscle that does this action, and it’s the muscle worked when you perform calf raises—lifting your heels while the toes stay pointed forward. It sits at the back of the lower leg and crosses the knee, enabling powerful push-off during these raises. The other options don’t move the ankle in that direction: the Rectus Abdominis is a core muscle that flexes the spine, the Tibialis Anterior runs along the shin and helps lift the foot upward (dorsiflexion), and the Deltoid is a shoulder muscle.