Lifespan Treadmill – The Number 1 Most loved Treadmill LifeSpan TR 1200i Folding Treadmill is the most popular treadmill and one of the cheapest members of the LifeSpan Treadmill family. The LifeSpan TR1200i folding treadmill is durable, reliable, and fixed with helpful features. With this LifeSpan treadmill, you can confidently walk, jog, or run in the comfort of …