IKMF competition rule. Records & Achievements category.
IKMF-certified judges must supervise and attest to the validity of any record attempt. For extreme marathon records, a single kettlebell with multi-switch is used in the 4 competition disciplines, or Long Cycle with 2 kettlebells according to traditional GS rules.
See the interactive comparison on KETTLEBELL MONSTER™ for filterable views and more detail.