Spirit is a worldwide leader in the treadmill industry. They have been making commercial and residential treadmills since 1988 in their 120,000 square foot facility located in Jonesboro, Arkansas. However, Spirit remains a family owned and operated business dedicated to revitalizing and reinventing the treadmill industry. Manufacturing quality treadmills that last is a top priority for Spirit Manufacturing. Here are a few of the innovations for which Spirit is responsible: The first company to offer Heart Rate Control treadmills The first to use PWM technology in residential treadmills The ONLY treadmill company to offer the Trax Flex system, an adjustable low-impact design on most of the treadmill The Model 247 Comes standard with Heart Rate Control and a large dot matrix display. It also features a unique controlled low impact Trax Flex(tm) system and heavy-duty components that make Spirit the solid value leader in the fitness industry. Trax Flex(tm) Long an industry leader in low impact design, Spirit is pleased to present Trax Flex(tm)- an exclusive controlled low impact system. Trax Flex(tm) offers outstanding stability while providing minimum stress to joints and knees. Spirit originated low impact design in 1992 with Cushion Flex(tm). Studies by a leading university recognized that system as the industry's best, resulting in a 365 percent lower impact than walking or running on asphalt. Spirit's all new Trax Flex(tm) improves upon that design, maximizing the use of a tri-action system to provide the very best in rigid, safe, low impact control. Suspended Floating Deck Suspended Floating Deck Most premium treadmills today incorporate a low impact floating deck. Spirit's recent introduction follows our commitment to continued controlled low impact design. Not too soft - not out of control side to side unwanted motion. More motion is not better! Spirit's suspended floating deck is attached solid at each corner to avoid unwanted "spring board" effect. Solid yet soft! Solid yet Flexible! Twin, heavy high durometer, synthetic rubber dampeners absorb foot plant shock loads as the runner/walker "pounds" the belt/deck. The deck is allowed to flex and absorb high impact loads that transfer to the large oversize dampeners mounted to the all steel highly responsive frame. Whisper Quiet Spirit treadmills are manufactured with the highest quality decks and belts offering the ultimate in smooth, quiet, long-lasting operation. Stable Operation Spirit's welded high allow all-steel frame is a solid construction design assuring a stable and safe running surface at all speeds and inclines. All Spirit treadmills feature the heaviest duty chassis and motors in their class. Beginning with powder coated steel frames and heavy-duty stable inclines, we add industrial quality motors with large diameter, all-steel, balanced flywheels for a vibration-free secure walking/running surface. All components are backed by the best warranties