IKMF competition rule. Marathon & Extended Formats category.
The IKMF Kettlebell Marathon is a continuous lifting event. The marathon (60 minutes) and half marathon (30 minutes) are performed with single or double kettlebells. Multiple hand switches are allowed for all single-KB disciplines. The defining rule: if the athlete puts the kettlebell(s) down before the set time expires, the entire result is voided (score = 0, athlete disqualified). This is uniquely strict compared to other organizations where setting the KB down merely terminates the set with good reps counting.
See the interactive comparison on KETTLEBELL MONSTER™ for filterable views and more detail.