Whether your workout involves running, walking, sports or gym equipment, a decent sport shoe is a must. Injury caused by inappropriate shoes can needlessly derail your fitness or weight loss attempt. Investing in a quality shoe can help you to prevent foot and ankle damage, and make your workout a more pleasant and comfortable experience. If you take your running (and your health) seriously, you should invest in a pair of shoes meant for the running gait and the specific biomechanics of a runner.