A treadmill is one of the electrical devices and must, therefore, be properly disposed of at a recycling center or recycling center.
That means you can’t just put it in the trash can and hope it will be taken away. You take the disposal into your own hands.
To do this, you can look for a recycling center in your area and telephone there to ask whether and when acceptance is possible.
You will then need to bring the treadmill there. Disposal is usually free. Sometimes, however, a small fee may have to be paid.
You can also inquire about this by telephone.