Best Low-Impact Exercises for Bad Knees (2026)

The 11 Moves at a Glance

The instinct with a painful knee is to protect it by moving less. The research says the opposite. Our full breakdown of the evidence on exercise for knee osteoarthritis covers dozens of trials, and the pattern is consistent: the right kind of loading reduces pain and improves function, while rest lets the muscles that protect the joint waste away.

This list applies that research at home. Every move keeps impact at zero, most keep the knee itself nearly still, and each one links to a full form page. One note before you start: "bad knees" covers everything from mild ache to post-surgical rehab. This article is for the achy-but-cleared crowd. If your knee is swollen, unstable, or undiagnosed, see a clinician before you see a workout list.

Why Does Exercise Help a Knee That Hurts?

Two findings anchor everything below. First, exercise works as a treatment. The 2015 Cochrane review by Fransen et al. pooled 54 trials of land-based exercise for knee osteoarthritis and found high-quality evidence of pain reduction, around 12 points on a 100-point scale, plus improved physical function and quality of life. Adverse events were rare and minor.

Second, loading the knee doesn't wear it out. A 2019 systematic review by Bricca et al. in the British Journal of Sports Medicine examined randomized trials of knee-loading exercise in people with or at risk of knee osteoarthritis and found no evidence of harm to articular cartilage. The "save your remaining cartilage by resting" model doesn't hold up.

Where should that loading go? Mostly the quads. A 2017 meta-regression by Bartholdy et al. across 45 trials found that programs following strength-training principles produced greater knee-extensor strength gains, and estimated that increasing quad strength by 30 to 40 percent would likely translate into meaningful improvements in pain and disability. That's why this list leans so hard on quad and hip work rather than stretching.

Do This, Skip That: Knee-Friendly Swaps

Most knee-pain advice tells you what to avoid and stops there. The more useful version is a swap: keep the training effect, drop the part that flares the joint.

"For now" is doing real work in that first column. None of those movements is banned forever. They're simply the wrong entry point for an irritable joint, and most people can reintroduce them gradually as strength returns.

Strengthen the Knee Directly

1. Wall Sits

Wall sits are our top pick for a reason: they load the quads hard while the knee joint holds completely still, which irritable knees tolerate better than almost anything else. Slide down to a depth that feels workable, hold, breathe, repeat. Chair pose from yoga trains the same shape if you prefer an unsupported version.

The trade-off: isometric holds build strength mostly at the angle you train, so vary your depth across sets and pair them with a moving pattern like quarter squats.

2. Quarter Squats

The quarter squat rebuilds the most useful movement pattern you own, sitting down and standing up, through the shallow range where kneecap stress stays low. Push through your heels and keep the descent slow.

The trade-off: it's tempting to camp at shallow range forever. The joint adapts to what you give it, so nudge your depth a little deeper every couple of weeks as comfort allows.

3. Calf Raises

Calf raises strengthen the muscles crossing the back of the knee and stabilizing the ankle below it. When the ankle is strong and controlled, less chaos travels up the chain to the knee. Do them on both legs, holding a wall for balance.

The trade-off: they do little for the quads, which carry most of the protective load. Treat calf raises as a supporting act.

Build the Hips That Unload the Knee

The knee is a hinge caught between two neighbors. When the hips are weak, the thigh collapses inward and the knee pays for it. These four moves strengthen the muscles that keep the knee tracking straight, and none of them asks the knee to bear meaningful load.

4. Glute Bridges

Glute bridges train hip extension with your back on the floor and the knee doing almost nothing. Drive through your heels, squeeze at the top, lower with control. If full range feels cranky behind the knee, partial glute bridges are the on-ramp.

The trade-off: bodyweight bridges get easy within weeks. Progress to single-leg versions or slow the tempo to keep them earning their spot.

5. Romanian Deadlifts

The Romanian deadlift teaches the hip hinge: hips travel back, knees stay softly bent, hamstrings stretch and drive you back up. Bodyweight or a light household weight is plenty to start. It's the most strength-per-rep of any move here, with almost zero knee motion.

The trade-off: it's the most technique-dependent entry on this list. A rounding lower back shifts stress somewhere you don't want it, so learn the pattern unloaded first.

6. Clamshells

Clamshells wake up the gluteus medius, the side-hip muscle that stops your knee from diving inward when you walk or climb stairs. Lie on your side, feet together, open the top knee without rolling your pelvis back.

The trade-off: the stimulus is modest. Clamshells prepare the hip for harder work; they're a warm-up staple, not a main course.

7. Side Planks

The side plank is the strength version of the clamshell, loading the lateral hip and trunk together in one hold. Stack your shoulders and hips, lift, and hold a straight line.

The trade-off: wrists and shoulders often complain before the hip does. Start with short holds from the forearm and build time gradually.

Stability, Core, and Gentle Movement

8. Bird Dogs

Bird dogs train balance and trunk control from all fours: extend the opposite arm and leg, hold, return. That coordination matters more than it looks. Steadier hips and trunk mean fewer of the small wobbles a sore knee has to absorb.

The trade-off: kneeling on a hard floor can bother the kneecap itself. A folded towel or mat under the knees usually solves it; if not, dead bugs cover similar ground on your back.

9. Dead Bugs

Dead bugs are core training with zero knee involvement: lying on your back, lower the opposite arm and leg while your lower back stays pressed to the floor.

The trade-off: intensity is low, and that's the point. They fill the core slot in a session without spending any of your knee's tolerance budget.

10. Marching in Place

Marching in place is the movement-break move: it raises your heart rate, lubricates the joint, and breaks up long sitting spells without a single moment of impact. Use it as a warm-up before the strength work above or in two-minute doses through the day.

The trade-off: it won't build strength. Its job is circulation and consistency, not adaptation.

11. Supported Split Squats

The split squat, done holding a chair or counter with a short range of motion, is the graduation exercise. Single-leg strength is what stairs, hikes, and getting off the floor actually demand, and this is the gentlest way to start rebuilding it.

The trade-off: it's the most knee-demanding move on this list. Save it for later weeks, keep the front shin vertical, and skip it entirely while symptoms are flared.

Which Cardio Is Easiest on Bad Knees?

Strength work protects the joint, but you still need something for your heart. Three options tolerate painful knees best, and the evidence backs the water as much as the road. In a 2016 randomized trial by Alkatan et al. in the Journal of Rheumatology, sedentary adults with osteoarthritis did 12 weeks of either swimming or stationary cycling. Both groups cut joint pain and stiffness and improved knee muscle power by 15 to 30 percent, with neither mode beating the other.

• Cycling: set the saddle high enough that your knee keeps a slight bend at the bottom of the stroke, then favor low resistance and a quick, easy cadence. A too-low saddle is the most common reason cycling hurts.
• Swimming and water walking: buoyancy strips most of your bodyweight off the joint while the water adds gentle resistance. Freestyle is usually the friendliest stroke; skip the breaststroke kick if it provokes pain.
• Walking: flat routes, supportive shoes, and short frequent walks beat one long weekend slog. Slight uphills are usually comfortable; long downhills are the part painful knees complain about.

Aim for 20 to 30 minutes, around 3 times a week, at an effort where you can still talk. Which mode? Whichever one you'll repeat.

How We Chose These 11

Plenty of "knee-friendly" lists are just generic beginner workouts with the jumping removed. Our criteria were stricter:

• Joint demand per unit of benefit. Every move delivers its stimulus with low compressive and shear stress on the knee, which is why isometrics, shallow ranges, and hip-dominant patterns dominate the list.
• Alignment with the trial evidence. The list is weighted toward quadriceps and hip strengthening because that's what the knee osteoarthritis exercise trials, from the Cochrane pool to the Bartholdy meta-regression, actually used and measured.
• A regression exists for bad days. Almost every entry has an easier version (partial bridges, shallower wall sits, shorter side-plank holds) so a flare-up shrinks the workout instead of canceling it.
• Home-executable. A wall, a floor, and a chair cover all 11. No machines, no gym visit on a day your knee already hurts.
• Full pattern coverage. Quads, hips, calves, core, and single-leg control each get direct work, because a knee is only as safe as the chain around it.

What we didn't do: test these on a rehab cohort ourselves. Rankings reflect the published evidence plus coaching judgment about tolerability, and your own clinician outranks both.

Which Should You Start With?

• Knee aches most days: start with wall sits, glute bridges, and clamshells, 3 days a week, plus short flat walks. Add quarter squats in week 2 or 3.
• Knee only complains during hard exercise: run the full 11 as a circuit, and use the swap table to replace the specific movements that provoke it.
• Coming back from a sedentary stretch: begin with the floor moves (bridges, dead bugs, clamshells) and marching before loading the standing work.
• Carrying extra weight or over 50: the same list applies; cycling and water work will likely feel best for cardio. Our joint pain fitness guide covers how to program around multiple achy joints at once.
• Diagnosed osteoarthritis: read the research summary, then bring this list to your clinician or physical therapist and build the plan together.

Two of these moves involve floors and low positions. If getting down and up is itself the hard part, that's worth telling your clinician too; it changes which entries come first, not whether you can train.