Most Muscle-Ups in 24 Hours
Record Holder
Metric
Date Achieved
Location
Atlas Record ID
Garrett Greiner
2,403 Muscle-Ups
29 December 2025
Keota, Iowa [USA]
20426055
Garrett Greiner established the world record for Most Muscle-Ups in 24 Hours by completing 2,403 valid repetitions during a single continuous attempt. The total was intentionally selected to honor the 2,403 Americans who lost their lives during the attack on Pearl Harbor.
Transparent Adjudicator's Statement
Summary of Claim
The claimant asserted that he completed 2,403 valid muscle-ups within approximately 18 hours during a continuous record attempt conducted in Keota, Iowa.
Evidence Submitted
Submitted evidence included continuous video documentation of the attempt, segmented video files covering the duration of the challenge, timestamp verification materials, repetition count records, claimant statements, and supporting documentation sufficient to reconstruct and verify the attempt from start to finish.
Comparative and Cross-Archive Benchmark Review
Atlas conducted a comparative review of publicly available records and benchmarks maintained by major world record organizations and publicly accessible archives. The strongest publicly documented benchmark identified during the review was 2,150 muscle-ups completed within a 24-hour period by Charlie Rose (United Kingdom) on 24 August 2025. Garrett Greiner's verified total of 2,403 muscle-ups exceeded that benchmark by 253 repetitions. Atlas did not identify any publicly documented performance exceeding 2,403 verified muscle-ups within a 24-hour period at the time of adjudication.
Verification Methodology
Atlas reviewed the submitted video evidence to confirm movement execution, repetition totals, continuity of the attempt, and elapsed time. The evidence was analyzed to verify that each accepted repetition satisfied the established muscle-up standard and that the cumulative total reached 2,403 valid repetitions within the allowable time period.
Adjudication Findings
The submitted evidence demonstrated that the claimant completed 2,403 valid muscle-ups during the attempt. Atlas found the documentation sufficient to establish continuity, verify the repetition count, and confirm compliance with the record requirements.
Conclusion
Based upon the evidence reviewed and the verification procedures applied, Atlas World Records recognizes Garrett Greiner as the world record holder for Most Muscle-Ups in 24 Hours with a verified total of 2,403 muscle-ups achieved on 29 December 2025 in Keota, Iowa, United States.
