Start with three questions: how much torso support is available, where are the edges relative to the shoulder blades, and how does that relationship change during setup?
This article focuses on the fit between the athlete and the pad. Use the human-centered engineering framework to assess the overall design and the scapular motion atlas to describe shoulder-blade movement.
Fit variable · geometry before judgment
Why Width Alone Does Not Describe Support
Three records. Three different questions.
Nominal width
Nominal width is a lateral dimension measured at a stated location.
Functional support
Functional support is the contact actually available under a particular torso after upholstery compression and setup.
Edge clearance
Edge clearance is the distance between a body landmark or contact region and the surface boundary.
AMM Research · Visual 21Equipment photograph
Nominal width is only one part of the outline
Follow the support along the torso
Record local width, contour and loaded contact at each relevant station.
The top view shows how support width changes along a contoured surface.
Advanced Muscle Mechanics product-image archive. Original image, unaltered.
Record the surface, the person and the task
Geometry record
Width by station along the pad, contour, edge radius, upholstery build and deformation under load.
Person record
Bideltoid or biacromial breadth, posterior torso shape, tissue distribution, sex, body mass and the landmarks selected.
Task record
Scapular setup, grip, arch, bar path, unrack position, competition rules, load and familiarity.
Bideltoid breadth measures across the lateral deltoids; biacromial breadth uses bony shoulder landmarks. The NASA Anthropometric Source Book defines bideltoid breadth as a formal body dimension.[1] Record these separately from the torso area that contacts the bench.
Rule boundary · legality is not fit
The Competition Rule Defines a Range, Not an Optimum
The 2026 International Powerlifting Federation Technical Rulebook specifies a bench width of 29–32 cm, a length of at least 1.22 m, an uncompressed height of 42–45 cm and required body contacts during the lift.[2] Assess the athlete’s fit within those competition requirements.
Is the bench legal and is the lift performed within the competition contact requirements?
Where does this athlete contact this surface, how much clearance remains, and do measured mechanics or performance change?
Evaluate fit for the intended task: competition, general training, clinical exercise or research.
Dave Tate’s practitioner account describes lifters adjusting their shoulder blades, upper back and whole-body position to create a stable pressing surface on a fixed-width bench.[3] The practical question is how well that surface supports the lifter while allowing the intended shoulder movement.
Fit cases · read the lateral boundary
Where the Pad Edges Sit for Different Lifters
These illustrative examples show how the same pad width can provide different amounts of lateral clearance as body size and setup change. The red outline represents torso contact.
The same width creates different edge relationships
Contact envelope A
Same nominal pad width
A smaller lateral overhang
Contact envelope B
Same nominal pad width
A larger lateral overhang
Two illustrative torso-contact outlines on the same nominal pad width.
Article synthesis; see the references below.
Surface-dominant envelope
More lateral surface beyond the contact envelopeMay increase support area. It may also bring an edge or upholstery transition into a different relationship with the upper torso. Motion must be measured.
Matched envelope
Moderate lateral clearanceAssess pressure, stability and scapular motion to understand how this visually balanced fit behaves under load.Body-dominant envelope
Contact approaches or crosses the edgeMay change perceived support or clearance; assess those responses under the intended load and setup.Scapular retraction, thoracic elevation, grip and position relative to the rack change contact with the pad. Upholstery compression changes the loaded width and edge shape.
Measure width at the upper thorax, lower thorax and pelvis, especially on tapered or segmented surfaces. These local dimensions describe the support beneath the shoulders more clearly than one catalog width.
Four ways the boundary can change
More nominal width
Can increase available support area, but may also move the edge into a different shoulder–torso relationship.
Less nominal width
Can increase lateral clearance, but may reduce perceived support or alter stability for some bodies and setups.
Contour or taper
Can change local clearance without applying the same width change to the entire torso or pelvis.
Compression
Can round, flatten or effectively widen the loaded surface; unloaded measurements alone do not capture it.
The useful balance of support, clearance and compression depends on the training goal and the athlete’s ability to reproduce the position. Evaluate those factors together for the person and task.
Evidence audit · direct versus adjacent
What the Available Studies Tell Us
The studies reviewed here examine body dimensions, scapular setup and support surfaces. None isolates pad width; use them to identify what to assess when comparing widths.
Three research perspectives
Body dimensions relate to the task
Caruso and colleagues examined body mass, total arm length and biacromial width as predictors of maximal and submaximal bench-press performance.[4]
Standardized anthropometric definitions improve repeatability, but the relevant bench-contact envelope may require additional scanning or pressure/contact mapping rather than one caliper dimension.
Scapular setup & bar travel
In 28 trained men, a retracted versus freer scapular setup changed submaximal upward bar displacement but not velocity, 1RM, repetitions to failure, exertion or discomfort.[5]
p ≤ .024
No significant differences in the other reported strength, effort or discomfort outcomes.
Technique & modeled shoulder loads
In 10 experienced lifters using a light instrumented bar, grip, shoulder abduction and scapular pose altered selected model-estimated shoulder loads.[6]
Together, these studies show why grip and scapular setup should be kept consistent during a width comparison.
Protocol · test the interaction
How to Test Pad Width Fairly
A repeatable person–surface test
Use a crossover design to compare acute contact, motion and performance across widths. Follow repeated training exposures when evaluating adaptation or symptoms.
Make the comparison interpretable
Plan the analysis
The primary analysis should be pre-specified.
Test the interaction
Average condition effects may conceal the interaction that matters: a width could be neutral overall but meaningfully different for athletes near one edge of the body–surface ratio.
Show the response
Report individual responses, measurement reliability and familiarization alongside group means.
Support-Surface Findings
What Changes When the Support Changes
In 10 resistance-trained men, the 2026 Launch Pad® crossover study found higher acute pectoralis-major activation, higher mean and peak bar velocity, and greater vertical bar displacement with the contoured support versus the flat-bench condition.[7] Compare widths by holding the remaining surface and setup features constant.
Six measured outcomes, side by side
10 resistance-trained men · five repetitions at 70% 1RM · control versus thoracic-support condition.
Right pectoralis sEMG
% MVC · mean ± SD
p < .001 · d = .76
Left pectoralis sEMG
% MVC · mean ± SD
p < .001 · d = .85
Mean bar velocity
m/s · mean ± SD
p < .001 · d = .74
Peak bar velocity
m/s · mean ± SD
p < .001 · d = .98
Vertical bar displacement
cm · mean ± SD
p = .005 · d = 1.02
Concentric power
W · mean ± SD
p = .071 · d = .23
Not statistically significant
Bars show means ± standard deviation on zero-based scales. % MVC denotes activity normalized to maximum voluntary contraction. This study compared the complete support conditions.[7]
Inventing The Launch Pad traces the shoulder-clearance and support concerns behind the design.[8] Use the fit model to assess those features against the athlete’s body and setup.
Specify width alongside shape, body size, setup and task when evaluating fit. Competition legality, visual clearance, comfort, performance and shoulder mechanics are separate outcomes to assess.
Next concept · Article 07Range of Motion & Bench Press Performance: define the traveled region before judging itReferences
- NASA. (1978). Anthropometric Source Book, Volume II: A Handbook of Anthropometric Data. NASA Reference Publication 1024. Official PDF. ↩
- International Powerlifting Federation. (2026). Technical Rules Book, effective March 1, 2026, version 3. Official rulebook. ↩
- Tate D. (2008). EFS Bench Manual. elitefts, p. 12. Practitioner source supplied for this review. Related official elitefts article. ↩
- Caruso JF, Taylor ST, Lutz BM, Olson NM, Mason ML, Borgsmiller JA, et al. (2012). Anthropometry as a predictor of bench press performance done at different loads. Journal of Strength and Conditioning Research, 26(9), 2460–2467. doi:10.1519/JSC.0b013e31823c44bb. ↩
- 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. ↩
- 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. ↩
- 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. ↩
- Advanced Muscle Mechanics. Inventing The Launch Pad. Historical design article, reviewed August 2026. Original AMM article. ↩