Begin by standing on a comfortable surface, where you have plenty of room at each side
With a 5kg potato bag in each hand, extend your arms straight out from
your sides and hold them there as long as you can
Try to reach a full minute, and then relax
Each day you’ll find you can hold this position for just a bit longer
After a couple of weeks, move up to a 10kg potato bags.
Then try a 50kg potato bags and then eventually try to get to where you can and lift a 100kg potato bag in each hand and hold your arms straight for more then a full minute (I’m at this level)
After you feel confident at that level, put a potato in each bag 🙂