Sternocostal head

Schematic anatomy
Sternocostal head

Chest

Clavicular headSternocostal headPectoralis minor

Serratus anterior

Serratus anterior
Movement guide

Sternocostal head

The broad middle and lower portion draws your arm across your chest. Flat presses and fly variations load this region alongside the rest of the chest.

01

Barbell bench press

Compound · Barbell

Also works

Clavicular pectorals, anterior deltoids, triceps

How to perform

Plant your feet, keep your shoulder blades supported on the bench, and grip just wider than shoulder width. Lower the bar under control to your mid-chest, then press up.

Keep wrists stacked over elbows. Use a spotter or safety arms.

Example volume · 3–4 sets × 5–8 reps

02

Cable chest fly

Isolation · Cable

Also works

Clavicular pectorals, anterior deltoids

How to perform

Stand in a split stance between two pulleys. With a soft bend in your elbows, bring your hands together in front of your chest. Return slowly.

Move through the shoulder and keep the elbow angle steady.

Example volume · 2–3 sets × 10–15 reps

Referencesopenstax.org

Community draft · awaiting expert review