Runs Arounds Like A Maniac...

I have a 2year old cat....
By this age I would think he would be calmer, but not really...
Like around 9 and 10 pm he runs around like a maniac from the living room to the bathroom (I live in a 1 bedroom apartment)
And he also meows but its a deep meow...
This goes on for about an hour.
Is there something I should be worried about??
Thank You.

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