Total fitness - there are several great products and companies online that can help you maintain an easy regimen of fitness “games” that you can do in your house that build core strength, and maintain fitness. Search k-9 fitness in your browser and you will find lots of great resources on how you can build core strength in your living room.
And when you just want to cuddle on the couch with your newfs and a good book, there are tons of great dog training books, online training and obedience classes and tons of super You-Tube training videos available at a click of a mouse!
Stay cool, have fun and enjoy spending time with your best buds!