Question: How can I make sure the belt is not too tighten? What do I need to do?

Answer: The belt has the right tension if it doesn’t slip while you walk on run on it. If you feel any slippage, you must make some adjustments.

Each tread belt should have 2 adjustment screws (positioned like in the photo)

Turn both the left and the right tread belt adjustment screws 1/2 or 1/4 turn clockwise.

If the belt is too close to the right side or to the left side, you must make adjustments to each adjustment screws.

Walk on the treadmill to see how it fells after each change.

If you make adjustments and nothing happens, than you need to call a technician.