You can pause Walk it Out in 2 ways:
1) You can press the Home Button on your Wii Remote. This will bring up the option to quit or continue the game. You can press the Home Button again to close out of that menu and it will continue back where you left off.
2) You can also pause the game by accessing the Portable Player. The second you click on the Portable Player the game will be paused. If you do not know how to access the Portable Player, please check our knowledgebase article: Where is the portable player located? I don't see it on my screen.