Whether you're celebrating with your dad, kids or grandkids, Father's Day is a great reminder that fitness is key to a long and healthy life.
If you're already working out, that's great. If you're not hitting the gym regularly, start slow. Either way -- your age matters. Follow this fitness guide by decade to have healthy Father's Days for years to come.
If you're in your 20s
You're young. You're invincible (or at least as invincible as you're ever going to be.)
"This is when you should be running, jumping and playing," said Lecia Whitlock, an instructor at The National Personal Training Institute. "Test your body in any way that you can."
Think about explosive movements, plyometric drills and full-body movements -- like a lunge with an overhead dumbbell press -- that work more than a single muscle group. And have fun!
Challenge: Train for an extreme race like the Tough Mudder.