Here is a treadmill for serious athletes. The Sports Series 7500 Athletic Trainer Treadmill is designed for walking, running and HITTT. It has a Sled Bar for circuit training and challenging workouts. The incline is fixed at 7 or 11 degrees. It has an adjustable console with a larger display.
This treadmill has 8 resistance levels. It has a running area of 22″ x 60″.