Different shoes are needed for different types of exercise and movement. Save the running shoes for running. If you’re lifting weights it’s better to have flat shoes, as the support from running shoes will not do you any good. Running shoes are bad for lifter’s form and limit strength and stability. Some people prefer to lift shoeless or in Converse. Another great shoe for lifting is the adidas Superstar shoe. The flat bottom of the shoe increases strength, stability, and betters form. An all around win if you’re trying to see gains.