There is no denying that having a life partner can make every day better in so many ways. You have someone to share your thoughts and feelings and experiences with. You have someone to pick you up when you are down and to give love to when they feel blue.
There is also no denying that having a workout partner can make it easier to push through those hours at the gym or that last mile of your run. They push you to work harder and challenge you to want more.