If anyone's of a mind to,there ARE training vests;weight inserts will go from 10 to 50 pounds.You DO have to pad the top&front to avoid abrasions as you work,but they're a LOT more comfortable for a woods run( or other softer surface) than trying to keep plates from moving around in the pack.Plus,the weight cylinders aren't much bigger than a roll of dimes...good for other uses :dgrin: