Treadmills - The Good, the Bad, and the Ugly A treadmill can be a very useful tool to improve your cardiovascular fitness. A treadmill is a great alternative for those concerned about injuries. It is safe and convenient to use. Treadmills are great to train for intervals and high intensity. https://treadmillsmall38840.blogsuperapp.com/25211131/the-reasons-you-re-not-successing-at-treadmill