No, you do not experience significant time dilation while running on a treadmill. Time dilation effects, as described by the theory of special relativity, become noticeable only at speeds approaching the speed of light.
In everyday scenarios, such as running on a treadmill or moving at typical velocities on Earth, the effects of time dilation are negligible and not perceptible to us. The differences in time dilation are extremely small at speeds much lower than the speed of light.
Time dilation becomes more pronounced as an object's velocity approaches the speed of light. At velocities comparable to the speed of light, the time dilation effects become significant. However, in day-to-day life, the speeds we encounter are far below this threshold, so any time dilation experienced is extremely minuscule and not practically measurable.
So, while running on a treadmill, the difference in the passage of time compared to a stationary observer would be negligible and not something that you would notice or perceive.