Abstract: A treadmill comprising a belt attached to a traveling block, the block selectively moving up and down treadmill stanchions to change incline. The treadmill is programmable regarding simulated course, distance, initial speed, and user weight, and records approximate caloric expenditure. Sensors strategically positioned below the belt upper surface regulate belt speed to keep a user toward the center of the treadmill. A port receives a removable memory device for recording and playback of user performances. Even multiple users thereby have an ongoing reference on the same machine.