Swimming vs Walking for an Arthritic Dog: How to Choose (and When to Do Both)

By Justin Shmalberg, DVM, CVA, ACVN, ACVSMR

Exercise & activity · August 14, 2026 · 5 min read

An arthritic dog rarely needs one exercise crowned the winner — they need a plan that uses swimming and walking for different jobs.

Quick decision checklist — read this first, then the reasoning below:

• Choose swimming when: pain is flaring, the dog is overweight, or a vet/rehab professional has flagged joint loading as the priority to reduce right now.
• Choose walking when: the dog is stable, needs muscle to stay built around the joint, or has a heart or skin condition that makes water exercise riskier than land exercise.
• Do both when: the dog is a good candidate for either — most arthritic dogs are — and you can space them across the week instead of picking a permanent side.
• Skip both, call your vet first, if: there’s a new or worsening limp, any swelling, or your dog won’t bear weight on a limb at all.
• Never skip: a body-condition check. Extra weight loads the joint more than either exercise choice does.

I’ve had this conversation more times than I can count with owners standing in an exam room holding a leash in one hand and a life jacket brochure in the other, waiting for me to just pick one.

Why this isn’t really a competition

Swimming and walking stress a joint in almost opposite ways, and that’s the whole reason the question feels hard to answer with a single word. Walking is weight-bearing. Every step loads the hip, stifle, or elbow with something close to the dog’s full body weight, and that loading is exactly what stimulates and maintains the muscle that stabilizes an arthritic joint. Swimming removes most of that load. Buoyancy takes weight off the joint while the dog still moves it through a full range of motion, which is why rehabilitation programs lean on water work when a joint is inflamed or a dog is recovering from a flare.

Neither exercise fixes the underlying joint disease. What they do is manage the two things that make arthritis worse day to day: excess load on a damaged joint, and the muscle loss that happens when a painful joint gets used less. A dog that only swims can lose the very muscle that protects the joint on land. A dog that only walks through a flare can grind through an inflamed joint with no low-impact alternative in the rotation.

What I’ve watched play out in practice

One of the dogs I worked with was a nine-year-old Labrador, about 78 pounds, with moderate hip osteoarthritis confirmed on radiographs. Her owner had noticed she’d started hesitating before jumping into the car, and by the time I saw her she was also slow to rise after lying on the kitchen tile in the mornings — worse in cold weather, better by midday. The owner’s instinct was to switch her entirely from walks to a heated therapy pool twice a week, partly because the dog seemed to enjoy it and partly because walking looked painful to watch. Within about six weeks of pool-only exercise, her gluteal and quadriceps muscle mass had visibly thinned, and her land mobility — getting up, navigating stairs — was actually a little worse, not better. We rebuilt the plan around short, frequent leash walks on flat ground most days, with swimming reserved for two sessions a week focused on range of motion. Her rising time and willingness to take stairs improved over the following two months.

The muscle argument for walking

I land on walking as the default daily habit for most arthritic dogs, with swimming layered in rather than substituted. That’s the counterargument I hear most from owners of water-loving dogs, and it’s a fair one — swimming feels safer and it’s easier on a painful joint in the moment. But a joint doesn’t stay stable on cartilage and pain medication alone; it stays stable because the muscle around it holds it in the right position and absorbs shock before the joint has to. Walking, kept short and frequent rather than long and occasional, is the exercise that builds and maintains that muscle. For more on getting the frequency and duration right for an aging or arthritic dog, see How Long Should a Dog’s Walk Be?, and if you’re walking in warmer months, check the guidance on when it’s too hot to walk a dog before you head out with a dog whose joints already limit how far she can move away from trouble.

Diet and body condition still do more heavy lifting than either exercise choice. A joint carrying extra weight is working harder with every step or every kick, regardless of which one you pick, and that’s worth addressing before debating exercise type at all — our starting guide to whole-dog wellness walks through where to begin.

Where nutrition support fits into the picture

Exercise choice manages load and muscle; it doesn’t touch what’s happening inside the joint itself. That’s where I look at ingredient-level evidence, carefully, without overselling it. Glucosamine and chondroitin are among the most studied joint support ingredients for dogs, according to a Boops Pets vet-reviewed claim list, and the mechanism behind chondroitin is that it supports healthy synovial fluid homeostasis, per a study in Frontiers in Veterinary Science. Separately, a review in the Journal of Veterinary Medical Science found that glucosamine HCl can help prevent experimentally induced cartilage degradation in vitro — laboratory evidence, not proof of outcomes in a walking or swimming dog, but a reasonable piece of the mechanistic case. Green-lipped mussel has a similar story: in a study published in Nutrients, mussel-derived compounds alleviated paw swelling in rats and reduced markers of inflammation. I weigh what a supplement can realistically do for diet, mobility, and recovery, and the honest answer is that it’s a supporting player, not a substitute for the exercise plan or the vet visit that should come first.

Building the actual weekly plan

Most arthritic dogs do best on a mixed schedule rather than an all-or-nothing choice, and the ratio shifts with how the dog is doing that week.

• During a flare or after a bad day: lean toward supervised swimming or pool walking; keep land walks short and slow.
• On stable weeks: short daily walks on flat, forgiving ground, with one or two swim sessions if the dog has access and tolerates water well.
• For dogs with heart disease, skin infections, or an intense fear of water: walking carries less risk; skip forcing the pool.
• For dogs with severe hip or elbow arthritis and good cardiac health: swimming can offer real range-of-motion work with minimal joint load.

The dogs I see doing best long-term aren’t the ones whose owners committed hard to one form of exercise. They’re the ones whose owners kept adjusting the mix as the dog’s good days and bad days shifted, checked in with a vet about pain control and weight, and treated both walking and swimming as tools rather than teams to root for.

Bottom line: don’t ask which exercise wins — ask what this week’s version of your dog’s joint needs, then use walking to build the muscle and swimming to spare the joint, in whatever ratio that requires.