Double-Unders, Sit-Ups, & KB Swings Posted on November 28, 2013 by Matt FRIDAY 291113 For time: 100 Double-unders 40 Sit-ups 40 Kettlebell swings, 24/16kg 100 Double-unders 30 Sit-ups 30 Kettlebell swings, 24/16kg 100 Double-unders 20 Sit-ups 20 Kettlebell swings, 24/16kg 100 Double-unders 10 Sit-ups 10 Kettlebell swings, 24/16kg Post time to comments.