Are Skull Crushers Push Or Pull? | Put It In The Right Day

Skull crushers look simple. Lie down, bend your elbows, straighten your elbows, repeat. Yet people still get stuck on one question: where do they belong in a split?

The clean answer is this: skull crushers are a push exercise. The working joint action is elbow extension, and the prime mover is the triceps. That lines up with how push/pull routines are usually organized: pushing work hits chest, shoulders, and triceps, while pulling work hits back and biceps. (Healthline’s push-pull overview lays out that common grouping.)

Still, the label “push” can feel odd because the weight travels toward your face on the way down. That’s the trap. Push vs. pull isn’t about where the dumbbell goes in space. It’s about which muscles create the force and what direction you’re pushing or pulling against resistance.

What “Push” And “Pull” Mean In The Gym

In a push movement, you produce force by pushing resistance away from your body or away from the joints doing the work. In a pull movement, you pull resistance toward your body or toward the joints doing the work.

Most lifters sort exercises by the main muscle groups that handle those force patterns. That’s why bench press, overhead press, dips, push-ups, and triceps extensions land on push day. Rows, pulldowns, pull-ups, and curls land on pull day.

This sorting isn’t about being fancy. It’s a practical way to manage fatigue. If you smoke your triceps on Monday, you’ll feel it when you bench and press on Tuesday. Put triceps-focused work on the same day as pressing, and your pulling day stays cleaner.

Skull Crushers As A Push Exercise In Push/Pull Splits

Skull crushers are a triceps extension. Your elbow bends and straightens. The triceps’ job is to extend the elbow, so it’s doing the heavy lifting.

That’s the same core pattern you see in cable pressdowns, machine triceps extensions, and overhead extensions. The American Council on Exercise describes triceps extension patterns as pressing the hands away by extending the elbow on extension machines. See the exercise description and cues in the ACE tricep extension entry.

Even when you use dumbbells and the weight drops behind your head, the job doesn’t change. You control the descent by resisting elbow flexion, then you extend the elbow to move the load back up. Mayo Clinic’s demo for a dumbbell triceps extension calls out that smooth elbow straightening as the driver of the lift. (Mayo Clinic triceps extension video.)

So if you run a push/pull/legs plan, skull crushers belong on push day. If you run upper/lower, they fit on upper days, usually paired after your main presses. If you run body-part days, they land with triceps, often with chest.

Why The “Pull” Confusion Happens

Skull crushers confuse people for three reasons.

1) The Weight Comes Toward You

On the way down, the bar travels toward your forehead or behind your head. That looks like pulling. Yet your triceps aren’t pulling the bar down. They’re controlling the descent as the elbows bend, then they extend the elbows to send the weight back up against gravity.

2) Your Lats And Upper Back Might Tense Up

When you hold a bar over your head, your shoulders and upper back brace to keep the position stable. Feeling your lats “on” doesn’t make it a pull exercise. It means you’re staying tight so your elbows can do their job.

3) Some Variations Add Shoulder Movement

A loose “lying triceps extension” can drift into a pullover-style path. When the upper arm swings a lot, the shoulder joint starts to join the party. That doesn’t turn it into a pull, but it can change which head of the triceps feels the work, and it can change how your shoulders feel afterward.

What Muscles Skull Crushers Train

Skull crushers target all three heads of the triceps: long head, lateral head, and medial head. The long head often gets extra attention when your elbows sit slightly back and the weight lowers behind your head, because the long head crosses the shoulder joint and is stretched more in that position.

Secondary work comes from the muscles that hold the shoulder and upper arm steady: parts of the shoulder complex, upper back, and forearms for grip. That’s normal. The movement is still driven by elbow extension.

If you want a plain-language check, use this test: if your triceps are the limiting factor and they’re the first to burn out, it belongs with pushing work. That’s how skull crushers behave for most lifters.

How To Place Skull Crushers In A Workout

Placement matters. If you put them too early, your elbows might get cranky and your pressing strength can drop. Put them too late, and you might rush form when tired.

A Simple Order That Works

• Main press (bench press, incline press, or overhead press)
• Secondary press (dumbbell press, machine press, dips, or push-ups)
• Triceps isolation (skull crushers, pressdowns, overhead extensions)
• Optional finisher (lighter pump work or a bodyweight set)

Skull crushers often shine as the first triceps isolation move, when you still have enough control to keep the path tight and the elbows happy.

Sets And Reps That Keep Form Clean

Most people do well with 2–4 working sets. Rep ranges like 8–15 are common because you can use manageable loads and keep tempo steady.

Heavy skull crushers can be done, but they ask a lot from the elbows and wrists, and form slips fast when fatigue hits. If your goal is triceps growth, clean reps and repeatable sessions beat ego loading.

Verywell Fit even labels skull crushers as a push exercise in its how-to article, which matches the push-day placement and the triceps-first focus. (Verywell Fit skull crusher overview.)

Common Push And Pull Moves And Where Skull Crushers Fit

It helps to see skull crushers beside other staples. The table below sorts classic upper-body moves by the main action and prime movers. Use it as a quick “where does this belong?” check when you build a split.

Exercise	Push Or Pull	Main Muscles
Bench press	Push	Chest, triceps, front delts
Overhead press	Push	Shoulders, triceps
Dips	Push	Chest, triceps, shoulders
Push-ups	Push	Chest, triceps, shoulders
Skull crushers	Push	Triceps (elbow extension)
Triceps pressdowns	Push	Triceps (elbow extension)
Pull-ups / chin-ups	Pull	Lats, upper back, biceps
Lat pulldown	Pull	Lats, upper back, biceps
Barbell row	Pull	Upper back, lats, biceps
Biceps curl	Pull	Biceps (elbow flexion)

Form Cues That Make Skull Crushers Feel Good

Skull crushers earn their reputation when people rush setup or chase load. Small changes can turn them from sketchy to smooth.

Start With The Right Elbow Position

Set your upper arms so they’re angled slightly back, not stacked straight over your face. That gives the triceps room to work and keeps the bar path away from your forehead.

Keep the elbows from flaring out. A small natural drift is fine, but big flare shifts stress toward the shoulders and can pinch the elbows.

Pick A Bar And Grip That Your Wrists Like

An EZ bar is a classic choice because the angled grips can feel kinder on wrists and elbows. Dumbbells also work well because you can rotate slightly to a comfortable angle.

Own The Bottom Position

Lower under control. Pause for a beat near the bottom if you tend to bounce. That pause also helps you feel the triceps stretch without loading the joints with sloppy momentum.

Press Up By Straightening The Elbows

Think “elbows extend” rather than “hands move.” When the focus stays on elbow extension, your shoulders stop taking over.

Variations That Match Different Bodies And Setups

Skull crushers aren’t one rigid move. Variations let you train the same pattern while adjusting comfort, equipment, and stimulus.

Variation	Best Fit	Setup Notes
EZ-bar skull crushers	Most lifters	Use angled grips; keep elbows from flaring
Dumbbell skull crushers	Wrist comfort, home gyms	Let wrists find a natural angle; control the descent
Decline skull crushers	More long-head stretch	Decline bench shifts the path; start light
Incline skull crushers	Different shoulder feel	Elbows often sit back; avoid big shoulder swing
Floor skull crushers	Range control	Floor limits depth; handy if elbows get sore
Cable skull crushers	Steady tension	Set pulley low; step forward to keep line of pull clean
Rolling dumbbell extensions	Blend of extension + slight press	Let elbows travel a bit, then extend; keep it smooth

Programming Tips For Push Days

If you want skull crushers to pay off, match them with the rest of your week.

Pair Them With A Shoulder-Friendly Press

If heavy benching makes your elbows feel beat up, put skull crushers after a dumbbell press or a machine press that’s easier on joints. You’ll still hit the triceps hard without stacking stress from one cranky setup.

Use A Second Triceps Move With A Different Feel

A common pairing is skull crushers plus a cable pressdown or a machine extension. One loads the triceps in a stretched position, the other loads it in a shorter position. That mix often feels balanced over time.

Watch Total Weekly Elbow Extension Volume

Pressing already trains triceps. If you bench and overhead press twice a week, you may not need a mountain of extra triceps sets. Start modest, then add sets only if recovery stays solid and your elbows stay calm.

When Skull Crushers Might Not Be The Move

If skull crushers irritate your elbows, don’t treat that as a character test. Swap the tool, keep the goal.

Try These Swaps

• Cable pressdowns with a rope or straight bar
• Machine triceps extensions with a controlled tempo
• Overhead cable extensions if the stretched position feels better
• Close-grip push-ups if you want a joint-friendly bodyweight option

If you still want a skull-crusher style lift, change the range. Floor variations shorten the bottom position. Lighter loads with a slower descent can also calm cranky elbows while keeping the triceps working.

So, Where Do Skull Crushers Go?

Put skull crushers on push day. They’re driven by elbow extension, and the triceps is the main worker. That matches the standard push/pull split logic used by many coaches and lifters.

If you train with an upper/lower split, they belong on upper days. If you train by body part, they sit with triceps, often after chest pressing.

Keep the setup tight, keep the descent under control, and pick a variation that your elbows like. Do that, and skull crushers stop being a scary-named move and become a steady triceps builder that fits cleanly into your week.