Arch strength and flexibility exercises can help counter flat feet. To build arch strength, you can sit down and use one foot at a time to pick up or pull on a soft object positioned on the floor in front of you, such as a towel. To stretch your arch muscles, you can perform calf raises on the edge of a step or small platform. You should start with your feet in a flat position with your heels unsupported, rise onto your tiptoes, and then lower back down so your heel is slightly below the level of your toes. You can also stretch your upper calves by sitting on the ground and pulling your foot toward you to flex it. When performing any of these exercises, be careful to stay control and listen to your body to avoid causing further foot injuries.