One of a cat’s responsibilities towards his human is that human’s physical well-being. Ensure your human gets as much activity as possible by racing them to the nearest restroom and securing the facilities when they appear to be heading that direction.
This will force the human to continue on to the farther restroom if they wish to use the toilet, increasing their activity level.
This exercise technique may backfire if the human is so lazy they wait till the last possible minute to make the bathroom run.
You will then find yourself summarily shoved to the floor.