With a new running belt 22" wide and 63" long, Trackmaster now provides more running area than any club treamill in the industry. The double-sided running deck gives years of sevice and absorbs and dampens even the most punishing shocks better than any previous model. The patented Master TrackÖ belt alignment systems eliminates the need to periodically align the running belt. Trackmaster's new low-profile hood quites motor noise and allows easier acces for maintenance, while the sleek, restyled frame complements decor and layout. Trackmaster's quite, reliable AC inverter drive can easily handle users up to 400 pounds without the belt lag you'll find in leser treadmills. The Trackmaster TMX22 and TMX55 provides both Polar« and contact heart rate displays as a standard feature. Medical option available (RS232)