Does Arm Training Actually Matter for Your Bench

The conventional wisdom in powerlifting: don't bother with curls, your arms get enough work from the big lifts. The conventional wisdom in bodybuilding: arms need direct work to grow. Both camps are partially right and missing the full picture.

Let's be specific about which muscles we are talking about and what the evidence actually says.

The Triceps: Non-Negotiable

The triceps are the primary mover in the final third of the bench press. When a bench press fails at lockout — bar slows above the chest and stalls — the triceps are almost always the limiting factor.

Direct triceps work moves your bench. This is not disputed. Studies on bench press programming consistently show that triceps volume is one of the stronger predictors of bench press strength.

The bench press itself does train the triceps. But the bench press is a compound movement — the chest and shoulders share the load. If you want to specifically target tricep hypertrophy and development, isolation exercises (close-grip bench, tricep pressdowns, skull crushers) allow you to take the triceps to failure without the chest or shoulders giving out first.

Recommended direct triceps work: 4–8 hard sets per week. Overhead tricep extensions are particularly effective because they load the long head in a stretched position — mechanically advantageous for growth.

The Biceps: It's Complicated

The biceps do not contribute to the pressing motion of the bench press. They are an antagonist — they resist elbow extension. So bicep curls do not directly strengthen the bench press.

However, there is an indirect argument: strong biceps protect the elbow joint under heavy bench press loads, particularly during the eccentric phase. Elbow tendinopathy is a common issue for heavy pressers, and underdeveloped biceps relative to triceps can contribute to joint stress.

For injury prevention: some direct bicep work is worth doing. 2–4 sets per week of curls is not going to transform your bench, but it keeps the elbow joint healthy and balanced.

For bench press performance specifically: low priority. If you are choosing between more tricep work and more bicep work to improve your bench, choose triceps every time.

What Actually Moves the Bench

In order of impact:

1. Bench press frequency and volume. More specific practice, more improvement.
2. Triceps development. Lockout strength is often the limiter.
3. Chest development. The chest drives the bar off the chest and through the mid-range.
4. Shoulder stability. Weak rotator cuff and rear delts create instability that bleeds force.
5. Lat engagement. The lats stabilize the shoulder during the descent and provide a launch pad for the press.

Arms matter. They are just not the primary lever. A lifter who only does curls and skullcrushers and skips chest and shoulder work will stall quickly. A lifter who programs the big movements well and adds smart arm accessory work will progress faster than one who does the big movements alone.