Treadmills - The Good, the Bad, and the Ugly A treadmill can be a very useful tool to improve your cardiovascular fitness. It's also a great option for those who have injuries. It is easy to use and safe. Treadmills can be used to train for intervals and high intensity. https://treadmill73833.blogzag.com/69310470/7-simple-secrets-to-completely-enjoying-your-treadmill