If you suspect your treadmill is causing interference on your TV, try the following ideas to fix the problem:
Try a different outlet. Sometimes having your TV and treadmill plugged into the same power outlet or surge protector can cause interference. You can try plugging your TV or treadmill into another outlet.
You could also try using an extension cord running it from another room. If your TV and treadmill are plugged into the same circuit, then on rare occasions interference can happen.