Precor 946i Treadmill Reviews: Precor 946i Treadmill, a commercial-grade treadmill, is equipped with great features and provides a low-impact workout. The standard Integrated Footplant Technology and the Ground Effects Impact Control System are included. This helps to reduce the strain on joints and knees. It is modern in design and durable. Precor's best-selling … [Read more...] about Precor 946i Treadmill Reviews: Best Suited for Whom?