It's an easy trap to fall into: you've got a bouncy, seemingly tireless puppy, so you take them on a long hike, a run alongside your bike, or repeated rounds of stair-climbing to burn off that energy. The puppy seems thrilled in the moment. The problem is that a puppy's enthusiasm and their body's physical readiness are two completely different things, and pushing too much high-impact exercise on young, developing joints is one of the more common — and avoidable — causes of orthopedic problems later in life.
What's Actually Still Developing
Puppies aren't just small adult dogs. Their bones grow from areas called growth plates — softer, cartilage-like regions near the ends of long bones that gradually harden into solid bone as the puppy matures. Until that process finishes, growth plates are more vulnerable to injury than fully developed bone, and repeated high-impact stress — hard jumping, running on hard surfaces, forced long-distance runs, or repetitive stair use — can affect how they develop. Larger and giant breeds take longer to fully mature than small breeds, which is exactly why a one-size-fits-all exercise rule doesn't work well across different dogs; this ties into the broader picture in our guide to exercise needs by breed and age.
What Overexertion Can Look Like
Because puppies often don't self-regulate well — many will keep playing well past the point where they should stop — it helps to watch for signs rather than rely on the puppy to tell you they've had enough:
- Limping, favoring a leg, or stiffness after activity, even if it resolves after resting
- Suddenly slowing down, sitting or lying down mid-walk, or seeming reluctant to keep going
- Excessive panting or exhaustion that lasts well beyond what seems normal for the activity
- Soreness or reduced activity the following day
Any of these are worth mentioning to your vet, especially if they happen repeatedly or after a specific type of activity.
Lower-Impact Ways to Meet Their Energy Needs
The good news is that a puppy's seemingly endless energy doesn't have to be burned off through joint-stressing exercise. Short, gentle play sessions on soft ground, controlled leash walks at a puppy's own pace, and free play with other calm, appropriately-sized dogs are generally lower-impact than forced runs, repeated jumping, or long hikes on pavement. Mental work is also an excellent — and low-impact — outlet: a puppy's brain tires just as easily as their body, sometimes more so. Short training sessions practicing basic cues (see our guide to teaching new tricks at any age) and simple scent games work a puppy's mind without putting stress on joints that are still forming, and often leave them just as settled afterward as physical play would. Our guide to mental enrichment for dogs has more ideas that work well for puppies too.
General patterns worth discussing with your vet include favoring several short bursts of play over one long session, avoiding repetitive forced jumping (like repeated fetch off furniture or hard leaps), and being cautious with activities on slick or hard flooring where a puppy's still-developing coordination can lead to awkward falls.
Everyday Moments Count Too
It's not just formal "exercise time" that matters — a lot of joint stress in young puppies happens during ordinary daily moments that don't feel like exercise at all. Repeatedly letting a puppy jump on and off furniture, tearing up and down stairs unsupervised, or roughhousing hard with a much larger adult dog can add up over time even if no single incident looks dramatic. Using a ramp or lifting a puppy onto furniture, limiting free access to stairs, and supervising play with bigger dogs are all small habits that add up to real protection for developing joints, without requiring you to track a rigid schedule.
The Bottom Line
A puppy's boundless enthusiasm isn't a reliable guide to what their body can safely handle — their joints are doing serious construction work behind the scenes, and it's worth protecting that process. Favor shorter, gentler physical play, lean on mental enrichment to help burn energy safely, and ask your vet for guidance tailored to your puppy's breed and expected adult size, especially if you have a large or giant breed puppy.