Why do hamsters need wheels? Hamsters are very active creatures when they are in the wild. They spend most of their waking hours scurrying about foraging for food or digging burrows. Being housed in a cage doesn't shut down that biological programming! Physical health benefits A hamster wheel is essential for weight maintenance. Without enough exercise, your hamster could become obese. This puts a strain on the heart, lungs, and other organs and could shorten your life expectancy. Mental Health Benefits As naturally curious little creatures, they need mentally stimulating toys. Select a wheel to prevent them from getting stressed and restless.