Walking and running are great workouts for your heart and lower body, and they're also free. So take advantage of the warmer weather and make your workouts even more challenging and workout at the beach. Walking or running on sand burns about 30 percent more calories than you would on a harder surface such as asphalt. Resist walking on the flat sand right at the water's edge and go for the dry sand to make your workout harder. Walk without shoes so you can really use your toes to grip the ground. Walking and running barefoot in the sand is great for the muscles in your feet and your calves, but be careful running on uneven surfaces can increase the risk of sprains, sprains, and tendonitis. Build your running time up slowly and wear supportive shoes. Remember, if your feet get hot, you can always cool off by walking on the wet sand, which is great for exfoliating the dead skin cells from your heels and preventing fissures.