Scapular Motion During the Bench Press

Broader scientific context

How shoulder-blade position shapes the pressing task

The shoulder blades translate, rotate and tilt around the rib cage. Bench-press studies show how scapular setup relates to bar travel, performance and modeled shoulder loading.

Back to Shoulder Mechanics
The scapula moves around the thorax and changes its relationship to the clavicle and humerus. During pressing, muscle force, bar load and contact with the bench act on this linked system. Understanding those motions helps coaches use setup cues more precisely.
Directly studiedBench-press performance under retracted versus freer scapular setup; light-load technique combinations with motion capture, an instrumented bar and a musculoskeletal model.
Mostly adjacentDetailed three-dimensional scapular kinematics come mainly from arm-elevation, clinical and rehabilitation research, not heavy bench-press repetitions.
Still openHow production bench geometry changes scapular motion under meaningful loading, across body sizes and through repeated training exposure.

Layer 01 · Name the motion

The Shoulder Blade Moves in Several Directions

Scapular motion includes upward/downward rotation, internal/external rotation and anterior/posterior tilt, plus protraction/retraction and elevation/depression. Bone-pin research during dynamic shoulder movements helped define these three-dimensional motions.[1]

Shoulder bones with the scapula highlighted in red; posterior view.
Translation · Posterior view

Retraction ↔ protraction

Toward ↔ away from the spine

Medial or lateral movement around the thorax, not a complete description of rotation or tilt.

Shoulder bones with the scapula highlighted in red; posterior view.
Translation · Posterior view

Elevation ↔ depression

Up ↕ down along the thorax

Superior or inferior movement; a “down” cue does not guarantee a fixed position under load.

Shoulder bones with the scapula highlighted in red; posterior view.
Rotation · Posterior view

Upward ↔ downward

Glenoid turns upward ↔ downward

Changes glenoid orientation in the frontal plane; it is not synonymous with protraction.

Shoulder bones with the scapula highlighted in red; oblique view.
Rotation · Oblique view

Internal ↔ external

Orientation around the thorax

Describes orientation relative to the thorax; it requires a defined coordinate system.

Shoulder bones with the scapula highlighted in red; oblique view.
Rotation · Oblique view

Anterior ↔ posterior tilt

Anterior ↔ posterior tipping

Top-to-bottom tipping relative to the thorax.

Shoulder bones with the scapula highlighted in red; oblique view.
Linked system · Oblique view

Scapula + clavicle + humerus

Linked bones share the movement

Scapular, clavicular and humeral motion contribute to the press.

Illustrative anatomy: red identifies the scapula and ivory the surrounding bones. Labels name the directions of movement, not measured poses, angles or a prescribed bench-press trajectory.[1][2]

These terms are coordinate-dependent and not perfectly interchangeable across methods. Clinical reviews also caution that scapular differences can be associated with shoulder conditions without establishing a single causal pattern.[2] The 2013 Scapular Summit likewise framed dyskinesis as an impairment finding that requires context, not a stand-alone diagnosis.[3]

Layer 02 · Locate the phase

Consider Each Phase of the Lift

Scapular behavior may differ during the unrack, descent, reversal, ascent and rack. Evaluating a setup cue through those phases means recording scapular motion alongside bar movement and timing. Technique scores and setup images add context to that motion record.

01Set + unrack

Initial torso contact, scapular pose and the perturbation created when the bar leaves the hooks.

02Lower

Posterior contact rises while humeral position and bar path change.

03Reversal

Peak descent depth and transition timing; a static cue may be most challenged here.

04Press

Force direction and humeral motion evolve through the sticking region.

05Rack

Scapular and torso positions may change again as the athlete reaches the uprights.

Describe scapular movement by direction and phase, alongside the load, bar path and bench contact.

Measurement method changes the answer

Method detail: how scapular motion is measured

Skin-mounted markers are practical for loaded movement, but the scapula lies beneath layers of moving soft tissue. Acromion marker-set approaches can estimate orientation while the marker set remains secure; palpation-based methods can identify landmarks at selected poses; bone pins and imaging reduce some soft-tissue uncertainty but are invasive, constrained or difficult to combine with heavy lifting. A study’s method therefore determines both the available motion record and the confidence appropriate to it.

Video or technique scoreUseful for visible setup and repeatability. It cannot resolve three-dimensional scapular rotations beneath the skin.
Optical motion captureCan synchronize body and bar kinematics, but scapular tracking and marker occlusion require explicit validation and reporting.
Imaging or bone-fixed sensorsCan strengthen in-vivo kinematic validity, usually at the cost of invasiveness, loading freedom or ecological realism.
Contact or pressure mappingCan show where the torso loads the pad. It does not reveal scapular orientation unless paired with a motion method.

Bench contact can obscure posterior markers. Motion studies must account for that contact when calibrating and interpreting scapular tracking.

Layer 03 · Bench-Press Studies

What Bench-Specific Studies Show

Direct bench test

Retracted versus freer setup

Piepoli and colleagues studied 28 recreationally trained men in randomized-order sessions. They compared a flat/free-scapula condition with a retracted setup across maximal velocity tests at 40%, 60% and 80% 1RM, 1RM testing and repetitions to failure at 70% 1RM.[4]

Piepoli et al. · 2023 · setup comparison

A change in bar travel, with a distinct performance profile

Upward bar displacement
Lower with retractionSubmaximal-load comparisons · p ≤ .024
Mean bar velocity
No detected condition differencep ≥ .473
1RM / repetitions to failure
No detected condition differencep = .147 / p = .447
Summary of the reported performance comparisons [4].
Read the complete performance findings
  • Retraction produced lower upward bar displacement at submaximal loads (p ≤ .024).
  • No condition differences were detected for mean velocity (p ≥ .473), 1RM (p = .147), repetitions to failure (p = .447), RPE or discomfort.
  • Performance tended to favor the variant with which each participant was more familiar.

The study compared instructed setups and performance outcomes.

Direct model-informed test

Pose, grip and abduction

Noteboom and colleagues tested 10 healthy, experienced lifters through 21 combinations of grip width, shoulder-abduction target and scapular condition with a 16 kg instrumented bar, motion capture and an OpenSim shoulder model.[5]

Noteboom et al. · 2024 · modeled muscle activity

Scapular pose changed the model’s muscular demand

Four selected rotator-cuff parts, with the complete eight-part table below. Every panel uses the same 0–1 scale.

Supraspinatus anterior

Neutral0.62 relative activity

SD 0.17 relative activity

Retracted0.50 relative activity

SD 0.17 relative activity

Released0.60 relative activity

SD 0.16 relative activity

relative activity · mean with SD · zero-origin scale

Modeled peak activity; maximum activity = 1. Study [5].

Supraspinatus posterior

Neutral0.25 relative activity

SD 0.07 relative activity

Retracted0.19 relative activity

SD 0.06 relative activity

Released0.24 relative activity

SD 0.07 relative activity

relative activity · mean with SD · zero-origin scale

Modeled peak activity; maximum activity = 1. Study [5].

Infraspinatus inferior

Neutral0.28 relative activity

SD 0.10 relative activity

Retracted0.24 relative activity

SD 0.11 relative activity

Released0.28 relative activity

SD 0.10 relative activity

relative activity · mean with SD · zero-origin scale

Modeled peak activity; maximum activity = 1. Study [5].

Subscapularis medialis

Neutral0.28 relative activity

SD 0.14 relative activity

Retracted0.21 relative activity

SD 0.11 relative activity

Released0.27 relative activity

SD 0.15 relative activity

relative activity · mean with SD · zero-origin scale

Modeled peak activity; maximum activity = 1. Study [5].
View all eight modeled rotator-cuff parts
Noteboom et al. · Table 2 · mean ± SD · relative activity
Modeled muscle part Neutral Retracted Released
Infraspinatus inferior 0.28 ± 0.10 0.24 ± 0.11 0.28 ± 0.10
Infraspinatus superior 0.33 ± 0.10 0.29 ± 0.11 0.30 ± 0.10
Teres minor 0.16 ± 0.06 0.14 ± 0.08 0.16 ± 0.06
Subscapularis superior 0.30 ± 0.14 0.25 ± 0.13 0.30 ± 0.15
Subscapularis medialis 0.28 ± 0.14 0.21 ± 0.11 0.27 ± 0.15
Subscapularis inferior 0.34 ± 0.13 0.29 ± 0.14 0.32 ± 0.14
Supraspinatus posterior 0.25 ± 0.07 0.19 ± 0.06 0.24 ± 0.07
Supraspinatus anterior 0.62 ± 0.17 0.50 ± 0.17 0.60 ± 0.16
Modeled peak muscle activity in 10 lifters using a 16 kg bar across 21 technique combinations. Peaks were averaged across repetitions, trials and participants [5].
Read the joint-force findings and model context
  • Retracted versus neutral conditions reduced selected modeled glenohumeral and acromioclavicular reaction-force components.
  • Released versus neutral conditions did not differ in modeled joint-reaction force.
  • Outputs depended on the model, force inputs and light-load protocol.

Montenegro et al. · 2026 · motor learning

The exercise order changed; the training volume was matched

High contextual interference

  1. Bench set
  2. Seal rows during the 3-minute rest
  3. Next bench set

Low contextual interference

  1. Bench sets and rests
  2. Finish the bench work
  3. Seal-row work
15 powerlifters6 weeks13-point technique checklist
Sequence summary, not a timing scale. Strength improved in both groups without a group-by-time strength effect; the reported technique-score effects are detailed below. Study [6].
Study detail: technique scores, strength and scapular retraction

A 2026 coaching study adds a motor-learning signal rather than a kinematic one. Montenegro and colleagues randomized 15 powerlifters to six weeks of the same volume-matched seal-row and bench training. The high-contextual-interference group performed seal rows during the three-minute rests between bench sets; the low-interference group performed them after the bench work. Both groups improved strength without a group-by-time strength effect. Group-by-time effects were reported for the global bench-technique score (p = .038) and its scapular adduction/retraction item (p = .009), with the high-interference group improving that item at the final test.[6] The retraction item was part of a 13-point, video-scored bench-technique checklist, so it describes observed technique rather than a measured scapular angle.

What the direct studies support

Scapular setup instructions can alter bar displacement and selected model estimates under defined protocols. Familiarity and task context matter.

What remains unestablished

No cited study maps heavy bench-press scapular motion across every phase or proves that one scapular cue prevents injury.

Layer 04 · Applying Coaching Cues

Make Coaching Cues Specific

In the EFS Bench Manual, Dave Tate coordinates the feet, upper back, lats, shoulder blades and pressure on the traps into a stable pressing base.[7] Practice that setup under the athlete’s intended load and range.

AMM Research · From cue to measurement

Keep the instruction and the movement record connected

A matched posterior view makes the shoulder blades easier to locate against the rib cage.

Posterior anatomical illustration of protraction, with the shoulder blades farther from the spine.

Protraction

Scapulae move around the thorax, away from the spine.

Posterior anatomical illustration of retraction, with the shoulder blades closer to the spine.

Retraction

Scapulae move closer to the spine over the back of the rib cage.

01 · INSTRUCTION

What the coach asks

Retract, build a base or maintain torso contact.

02 · EXECUTION

What the athlete does

Record the setup, repetition phase and visible technique.

03 · MEASUREMENT

What the study resolves

Translation, rotation and tilt need a validated motion record.

The anatomical view identifies the shoulder blades and surrounding bones. The three records distinguish coaching intent, execution and measurement; they do not depict measured bench-press motion. Reconstructed anatomy illustration: tissue is selectively removed to reveal the posterior scapulae. Separation is illustrative, not a measured excursion or a safe/unsafe classification. Bench contact, load and technique affect the task. Article synthesis; Study [1]–Study [5]. View full comparison.

Retraction cues can help organize a repeatable setup. Apply them in the context of the athlete, load and phase of the repetition.

“Pin them back”A retraction cue. Check whether the athlete can maintain the intended upper-back setup through the unrack and press.
“Build the base”Coordinate the feet, upper back, lats and bench contact for a repeatable start position.
“Give the shoulders room”Check clearance around the shoulders and upper arms through the intended movement range.
“Stay tight”Maintain torso contact and control while the arms move through the press.
Better recordState the setup, grip, load, surface, bar path, phase and symptom response. When possible, film repeatable views and change one variable at a time.

For a pain-free athlete, the immediate coaching question is usually reproducibility: can the setup be repeated, the unrack controlled and the bar path maintained without an escalating symptom response? For persistent pain, weakness, neurological symptoms, postoperative restrictions or return-to-sport decisions, a cue is not a substitute for clinical assessment.

Layer 05 · Turn “freedom” into a test

How Contact With the Bench May Affect Movement

Bench width, contour, compliance and friction affect torso contact and may change shoulder clearance and available setup positions. Bench Pad Width & Shoulder Mechanics examines how those features fit different athletes.

Independent variablesPad width and contour · surface friction · compression · rack geometry · load · grip · setup instruction.
Required motion outcomesPhase-resolved scapular rotations/translations, humeral kinematics and repeatability, not bar displacement alone.
Required contextTorso breadth, training experience, sex distribution, familiarity, symptom status and meaningful loading.

Layer 06 · Launch Pad Findings

Scapular Motion and the Launch Pad Findings

In the acute crossover study of 10 resistance-trained men, The Launch Pad® produced greater vertical bar displacement and mean bar velocity; concentric power did not differ significantly.[8] The Athlete-to-Bench Interface brings together the acute and training studies.

Kidwell et al. · 2026 · acute crossover

The published measurements describe the bar and muscle activity

Ten trained men completed five repetitions at 70% 1RM under each condition. Selected bar outcomes are shown below; the article links to the full acute-evidence review.

Vertical bar displacement

Flat bench38 cm

SD 7 cm

Launch Pad44 cm

SD 4 cm

cm · mean with SD · zero-origin scale

Reported as ROM in Table 1 · p = .005. Study [8].

Mean bar velocity

Flat bench0.40 m/s

SD 0.09 m/s

Launch Pad0.47 m/s

SD 0.09 m/s

m/s · mean with SD · zero-origin scale

p < .001. Study [8].

Concentric power

Flat bench249 W

SD 103 W

Launch Pad271 W

SD 93 W

W · mean with SD · zero-origin scale

No statistically significant difference · p = .071. Study [8].
Means and SDs from Table 1, with labeled units and zero-origin scales. Vertical bar displacement is not a direct measure of scapular movement [8].
Next concept · Article 06Bench Pad Width & Shoulder Mechanics: from motion language to fit-envelope testing

References

  1. McClure PW, Michener LA, Sennett BJ, Karduna AR. (2001). Direct 3-dimensional measurement of scapular kinematics during dynamic movements in vivo. Journal of Shoulder and Elbow Surgery, 10(3), 269–277. doi:10.1067/mse.2001.112954. PubMed record. ↩
  2. Ludewig PM, Reynolds JF. (2009). The association of scapular kinematics and glenohumeral joint pathologies. Journal of Orthopaedic & Sports Physical Therapy, 39(2), 90–104. doi:10.2519/jospt.2009.2808. ↩
  3. Kibler WB, Ludewig PM, McClure PW, Michener LA, Bak K, Sciascia AD. (2013). Clinical implications of scapular dyskinesis in shoulder injury: the 2013 consensus statement from the ‘Scapular Summit’. British Journal of Sports Medicine, 47(14), 877–885. doi:10.1136/bjsports-2013-092425. ↩
  4. Piepoli A, Miras-Moreno S, Janicijevic D, Martínez-Amat A, García-Ramos A. (2023). Differences in various strength manifestations between the flat and retracted bench press variants: are they affected by subjects’ experience or strength levels? Journal of Strength and Conditioning Research, 37(12), 2339–2345. doi:10.1519/JSC.0000000000004561. ↩
  5. Noteboom L, Belli I, Hoozemans MJM, Seth A, Veeger HEJ, van der Helm FCT. (2024). Effects of bench press technique variations on musculoskeletal shoulder loads and potential injury risk. Frontiers in Physiology, 15, 1393235. doi:10.3389/fphys.2024.1393235. ↩
  6. Montenegro S, Izzicupo P, Prestanti I, Serafini S, Fusco A, Sartor F. (2026). Optimizing powerlifting bench press technique using contextual interference via antagonist task selection. Applied Sciences, 16(11), 5511. doi:10.3390/app16115511. ↩
  7. Tate D. (2008). EFS Bench Manual. elitefts, pp. 8, 12. Practitioner source supplied for this review. Related official elitefts article. ↩
  8. Kidwell JA, Yamamoto T, Hetherton KJ, Truneh N, Bright JJ, Blatney AE, et al. (2026). Acute effects of thoracic-spinal elevation via a novel bench press pad on sEMG and barbell kinetics in resistance-trained males. International Journal of Exercise Science, 19(1), 1003. doi:10.70252/IJES2026103. ↩