There's passion for a person and there's passion for a sport. You're probably familiar with couples whose passions didn't mesh. He loved her and she loved golf. She was interested in him, but he was interested in basketball. But one passion doesn't have to extinguish the other.
It may take a little work and compromise on both sides, but if you can introduce your significant other to your sport or exercise of choice, you may discover your relationship becomes closer. What starts out as support ends up benefiting both of you in terms of physical health and couple bonding [source: Jayson].