But running on sand is risky, especially if you choose to run barefoot. Ease into barefoot running gradually - there's great potential to injure your ankles. And depending on the beach, there could be broken glass, shells or other debris that can injure your feet. The best place to run on the beach is near the water, at low tide. The sand will be more compact and easier to navigate. Be careful if the beach has a severe slope; this can put a strain on your knees and ankles and cause injury. Have plenty of water available for your workout - when it's hot, you need more water, and you can't rehydrate with salty ocean water.