If you participate in a sport three or more times a week, you need a sports-specific shoe to protect your feet where they get the most stress. eBay has separate categories for Women’s Athletic Shoes and Men’s Athletic Shoes. They can both be grouped into the following categories:

Running, training, and walking shoes: If you hike, jog, run, or walk for exercise, you need shoes that will provide extra shock absorption and will allow you to maintain your natural gait. The upper part of the shoe, whether natural or synthetic, should feel comfortable against your foot, and the tread should be smooth. Runners and joggers should look for shoes with extra cushioning, heel stability, and traction control. The shoe should also be light and flexible. Shoes from the Nike Shox series, for example, have all these qualities.
Tennis shoes: Tennis requires a lot of side-to-side motion, so tennis shoes provide more stability in the sides. Make sure to get a pair with cushioning that allows for quick lateral movements without ankle sprain.
Basketball shoes: Basketball players also need top stability, so get a pair of basketball shoes with mid-foot, heel, and ankle support, as well as a good-quality lacing system. You’ll also need breathability, because you’re going to heat up during a game. Choose basketball shoes with uppers made of leather, nylon, mesh, or other breathable material to keep cool. And, of course, you’ll want a great style to make your teammates jealous.