Good overhead press form does not start with cueing every lumbar arch away. If your client cannot reach overhead against a wall without trunk compensation, “ribs down” may ask for a position they do not own.
A 2024 study of 34 recreational strength trainees used a back-to-wall shoulder-flexion test. Less-experienced lifters showed a 19.71° dominant-side flexion deficit, compared with 6.41° in the more-experienced group. However, note that the study was cross-sectional, so it cannot prove training experience caused the difference.
What new coaches often get backward is cueing the compensation before testing the position. A visible arch can reflect range, trunk position, load, or setup. Use the Range–Position–Path Press Check before deciding what the rep means.
1. Check Range Before You Correct the Rep
First, remove the press and see whether your client owns the overhead position without load. A back-to-wall shoulder-flexion test limits trunk contribution and shows whether the reach is available before the bar adds load, grip, and balance demands. If the range is absent, a stronger cue cannot create it.
For a repeatable screen, let your client practice the reach three to five times. Then take two measured trials with at least 45 seconds between them. The same 2024 study used that procedure with participants seated against a wall.
Watch where the movement changes. Note whether the arms stop short, the ribs lift, the lower back shifts, or one side differs. Do not turn the result into a diagnosis. The screen shows whether the position is available under those test conditions.
That distinction matters for overhead press form. If the unloaded reach is limited, investigate range before adding more bracing cues.
2. Check Whether Position Changes the Range
Next, change trunk and thoracic position and repeat the reach. Shoulder elevation depends on coordinated motion across the shoulder girdle, and thoracic position can alter available range. If a small positional change improves the reach, coach that position before blaming weak bracing.
In 34 healthy adults, a slouched posture reduced active shoulder elevation by 23.6° compared with an erect posture. Force with the arm horizontal was also 16.2% lower. That does not mean posture causes shoulder pain. It shows that trunk position can change what the shoulder expresses.
Retest after a small setup change. If range improves, coach the position that helped. If it does not, stop forcing the same explanation.
Do not pin the shoulder blades “down and back” throughout the press. Military-press research in 16 healthy men found greater scapular upward rotation and posterior tilt during the lift (Takashima et al., 2014).
Related: Mobility Programming Protocol
3. Check the Press Before You Blame Mobility
Finally, rebuild the press and test whether the compensation appears only under its real constraints. Load, grip width, and implement can all change the movement you see. If your client owns the unloaded position but arches only when pressing, inspect the press setup before prescribing more mobility work.
A study of 30 healthy adults performing a simulated overhead lift found the heavier load produced 3.75° more lumbar extension than the lighter one (Allen et al., 2012). Grip width matters too: a 2025 study of resistance-trained men found it changed shoulder and elbow motion, bar forces, and joint moments during a barbell shoulder press (Gundersen et al., 2025).
Change one variable at a time. Reduce the load, adjust the grip, or change the implement. Then retest the original movement. If overhead press form improves, the press itself gave you information.
The cost of treating every lumbar arch as the same fault is wasted coaching time. You may stretch a client who needs no extra range or cue away harmless movement.
The Range–Position–Path Press Check needs a progression rule too. If a pain-free client shows a modifiable range or control limitation, use a short block and retest.
One published wall-slide study used three sessions weekly for four weeks. Participants did three sets of 10 reps in week one, then 15, 20, and 25 reps in successive weeks. They held the top position for 10 seconds and rested two minutes between sets.
The participants had scapular downward rotation, so this is not a universal overhead-press prescription. Use it as an evidence-based programming example, then repeat the original screen.
Pain, recurring instability, progressive weakness, numbness, tingling, or unexplained range loss belongs outside a new coach’s diagnostic role.
FITHIRE — BROWSE COACHING ROLES THAT VALUE MOVEMENT EXPERTISE
Knowing more cues does not automatically make you a better coach. Strong coaching starts with knowing when to cue, test, or change the task. FitHire helps fitness professionals find roles where movement assessment and sound judgment matter.
FAQ
How much shoulder flexion do you need for an overhead press?
There is no universal angle for every lifter. ACE uses roughly 170–180° of shoulder flexion as a marker of good mobility. Your client still needs usable range for the specific press.
Should you stretch your shoulders before an overhead press?
Not automatically. Some clients already have plenty of range and need more control instead. For clients with shoulder hypermobility, aggressive stretching may be the wrong direction entirely.
What grip width should you use for a barbell overhead press?
There is no universal grip. In most cases, what can work are medium and narrow grips since they allow heavier loads than the wide grip.
When should a personal trainer refer a client with shoulder symptoms?
NSCA guidance flags recurring dislocations, progressive weakness, numbness or tingling, range loss, visible muscle loss, and shoulder pain at night for medical assessment.
Robert James Rivera is a contributing author for Coach360News, writing on fitness programming and movement assessment for new coaches.
About Robert James Rivera
Robert is a full-time freelance writer and editor specializing in the health niche and its ever-expanding sub-niches. As a food and nutrition scientist, he knows where to find the resources necessary to verify health claims.
