From the manual of the TT8, the flat top of the belt is 60 inches long with 3 inch diameter wheels at the ends. This gives an effective belt length of about 127 inches when you do the math.
Anyone want to check my math?
2*60 + 3 * Pi = 127 ?
The wheel diameter is actually 2.98in (Calibration, step 4). The manual actually doesn't say 60in either, that's in the specifications.
Also, the manual explains why she was touching the treadmill.
Important Safety Instructions
â– Use handrails provided; they are for your safety.
Pulse Grip Feature:
The Pulse (Heart Rate) window will display your current heart rate in beats per minute during the workout. You must use both left and right stainless steel sensors on the front cross bar to pick up your pulse. Pulse values are displayed anytime the computer is receiving a Grip Pulse signal. You
may not use the Grip Pulse feature while in Heart Rate Control.