Weighted vest training can help someone build muscle and increase strength. “The vest adds resistance to the walk, making it a bit harder,” says Craig. “The vest will make it a little harder to stand upright, so you’ll get some core activation, which will also mesh well with the extra leg workout.” But don’t assume that you’ll be getting a full-body workout when wearing a weighted vest during walks. “Remember that a weighted vest used while walking will only work your lower body, so if you want a full-body program, you’ll need to add some arm workouts to balance things out,” says Craig.