If you're into using the ViPR fitness system (and if you're not, you should be!) then this is a great challenge set by G...
For: all | Ability: Suitable for all competitors | Age: any age
A great test of strength and stamina that also acts as a terrific core workout.
Using a Bulgarian bag, do 5 sets of:
6 competitors. Leader: JasonAlexisMercado, score: 03:35.00