The Assault AirRunner is unlike anything else on our list of the best treadmills. Its non-motorised design and ballbearing-powered curved running deck respond to user input, meaning flitting ...

LifeSpan’s Fitness TR7000i is a commercial-grade treadmill—you’ll find this model in gyms and fitness centers, and it’s powered by a heavy-duty 3.5-hp motor. Not only does the Echelon ...