Hell yes. I worked out in old clothes for years before I realized I was serious enough about it that I might as well buy something that wasn't cotton. Call me stingy, call me whatever, I just didn't see the point in having special clothes to wear a couple hours a week. When it got to the point that I was doing it every day I finally felt like I could justify the expense. Somehow, someway, I managed to get strong without designer clothing and footwear.