Overhead Press: Front or Behind the Neck? Barbell or Machine?

Among shoulder press variations, the most debated is undoubtedly the "behind-the-neck" press. A generation of coaches declared it dangerous and removed it from programs entirely. Yet, like most absolute judgments, the topic is more nuanced than it seems.

What does the science show?

Coratella and colleagues (2022, Front Physiol) compared four press variations in eight competitive bodybuilders:

• The behind-the-neck barbell press produced significantly more stimulation than the front press for the middle deltoid (effect size 4.56) and the rear deltoid (8.65).
• The front press recruited the pectoralis major more (4.20).
• Free weights (barbell) provided clearly more deltoid stimulation than the machine — because the stabilization demand places extra load on the anterior deltoid.

McKean and Burkett (2015) defined the behind-the-neck press as "safe" in individuals with normal trunk stability and adequate shoulder range of motion. So the danger isn't absolute; it's a matter of suitability.

Practical takeaways for the coach

1. Don't erase the behind-the-neck press from your routine entirely — but apply it only with clients who have adequate shoulder external rotation, thoracic extension, and shoulder mobility. Run a quick screen with the Apley scratch test and overhead squat.
2. If you're entering a block focused on the rear + middle deltoid, the behind-the-neck press is a good compound choice; you can include it for 4–6 weeks at the start of the season.
3. Keep the front press as your standard for the anterior deltoid and upper chest.
4. The machine shoulder press is a safe entry point for beginners and those returning from rehab; deltoid stimulation is lower than with free weights, but so is the learning curve.
5. Start the behind-the-neck press light — at 50–60% of the client's front 1RM, until flawless technique is established.

The decision threshold

Set a simple rule: if the client can't lower the bar behind the neck with a neutral spine and a pain-free full ROM, drop the behind-the-neck press and work front-only. Reassess once mobility improves. "Never do it" is wrong, and so is "have everyone do it"; the right answer is hidden in the client's shoulder.