I saw the following video last week and it reminded me of the fact that often, we try to communicate and drive home a message on the basis of repetition alone. However, while repetition is a critical tool in a communicator's kit, if you're repeating a message that just plain doesn't resonate with the audience, you've got a different problem.
Sometimes, what you have to do is repackage the idea.
Enter the video I referenced and a new way of encouraging people to carve out 30 minutes of exercise a day: