When it comes to exercise, a cat may not be an ideal workout buddy. Just because cats move briskly and play games on some occasions with their human family, they are not considered to be athletic by definition. On the other hand, dogs are great exercise companions. A lot of breeds love to run, hike and trek along a trip.
Even if cats are not interested in exercise, this doesn't mean that they are sluggish. Cats use their lean muscles to leap/pounce on their prey whether it is a toy with feathers that is swayed from one side of the carpet to the other.
Dogs and cats are very different in terms of playtime. Most dogs love to play a game of fetch while cats usually watch a ball being tossed then walk way, not interested to join in the game. Fun playtime for a cat can be pouncing on the feet of its owner while he/she is sleeping under the blanket. Cats are nocturnal so they love to play at night while the dog is probably sleeping soundly.