Most Side-Seated Rear Delt Flies

Canada

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Calgary, Alberta, Canada / November 5, 2026

Stefan Popovic sat sideways on the seat of a rear delt fly machine at a gym in Calgary, Canada, and completed two one-armed flies with the pin in the bottom plate of the 300-pound weight stack. His phone, set on the floor in front of the machine, first shows the pin placement, then his right arm sweeping the handle out until it is level with his shoulder as the full stack rises off its rest. RecordSetter checked the pin and watched the stack lift on both reps in the continuous clip. Popovic, who has also logged one-handed rear delt flies facing the machine, turned sideways for this one and still moved the whole stack.

Tags: exercise, strength, fitness, weightlifting, one-handed

Rules

- Must use a selectorized rear delt fly machine with the weight stack set to 300 pounds; the weight is the machine's indicated stack setting, not a free-weight equivalent.
- Must sit sideways on the seat, side-on to the machine, and work one handle with the same arm throughout the set.
- Each fly must sweep the working arm out to the side until it is level with the shoulder, lifting the weight stack off its rest, and return the handle to its starting position.
- The non-working hand may brace the body but must not help move the working handle or lift the weight stack.
- Repetitions must be completed in one set; the set ends when the working handle is released or the performer leaves the seat.
- Must provide continuous video showing the selected weight and every repetition.
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