continuing Pete's post:
Rucking with your weapon does not fall into one of the exercise slots:
- Cardiovascular aerobic exercise, often called aerobic
- Strength (or resistance) training is the process of building and maintaining muscles in the body by using progressively heavier weights (or resistance).
- Stretching or lengthening your muscles, helping you become more limber
It's more of a muscle memory game. The idea being to condition your body to work with a load AND be battle ready with your weapon.
So what you use is immaterial. You can use a stick. The only requirement, it should be about the right size and weight.
A short piece #5 or #6 rebar (c attached size-weight chart), say 35-40 inches, to look like a walking stick?? Maybe a homemade sling of duck-tape?
Use your imagination.
My $00.00002