Iso-Lateral Bench Press

Starting weight and manufacturer load specs

Starting weight (starting resistance) is what the empty lever or sled already weighs on you before any plate is loaded, as stated by the manufacturer below with its source and date. Plate-loaded starting weight by brand

Mechanical model Needs measurements

F(θ) = SR(θ) + P·x_p(θ)/L_h (per arm, force perpendicular to the pivot→grip line)

1 input(s) sourced · 3 to measure on site

To measure: L_h (Pivot axis → centre of grip) · x_p(θ) (Horizontal distance pivot axis → plate horn axis, at start/mid/end) · θ (Arm angle at start/mid/end)

No official dimension drawing with pivot/horn/grip positions was found. Design patent US D321025 (Hammer Corp., 1991, "isolateral dumbbell press") only claims an ornamental design: its figures are not dimensioned and not to scale, so lengths cannot be read off it.

Derivation & sources Measurement protocol (French)

Measured / estimated resistance points

Guides about this machine

Hammer Strength starting weight and weight stacks: every catalogued machinePlate-loaded machine starting weight by brand: what the empty machine weighsHow to convert machine weight between gyms and brandsPlate-loaded vs selectorized machines: why the numbers differ

Same movement at other brands

One machine per brand for this movement. Open one to see its own specs and sources.

Arsenal Strength Reloaded Iso Flat PressAtlantis Strength Seated converging chest pressCybex Plate Loaded Chest PressExigo Plate Loaded 2.0 ISO Chest Pressgym80 Dual Chest PressHoist Fitness Chest PressLife Fitness Axiom Series Chest PressMatrix Fitness Magnum Supine Bench PressNautilus (commercial) Leverage Chest PressPanatta Vertical Chest PressPrecor Chest PressPrime Fitness Chest PressTechnogym Pure Strength Chest PressWatson Gym Equipment Single Stack Chest Press

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