Putting a treadmill directly on your carpet can cause damage to it. Appropriately protecting the carpet with a mat will save you from having to replace or repair it. Treadmills are heavy and cause pressure to the carpet fibers. It doesn’t matter if it’s made of natural or synthetic fibers; there will definitely be damage. After moving the treadmill, you’ll notice marks on the carpet that are sometimes impossible to remove. Getting a mat is a one-time investment that will protect both the floor and carpet, prevent dust and dirt from gathering under the treadmill, and protect the treadmill machine.