A debate has just cropped up.
A person running on a treadmill where the belt below him is travelling close to the speed of light.
(ignoring physical stress of course)
would time dilation effects occur? I think they wouldn't to the person on the treadmill.
How about the belt? Suppose it was made of rubber that perished after 5 years, would it hypothetically last for longer due to time dilation? Could you run on it for say 50 years and find it had only aged 1 year?