Most One-Handed Rear Delt Flies

Canada

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Calgary, Alberta, Canada / July 1, 2026

Stefan Popovic completed six one-handed rear delt flies on a gym machine in Calgary, Canada, using a stated 300-pound weight-stack setting. Seated facing the machine, he swept his right arm outward and returned the handle while keeping his left arm in front for support. Review of the uploaded footage confirmed six repetitions, with one arm doing the work.

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 remain seated facing the machine and use the same working hand throughout the set.
- Each fly must move the working arm outward to the side and return the handle to its starting position, following the form demonstrated in the original attempt.
- 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 video evidence showing the repetitions and identifying the selected weight.
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