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If running or jumping aggravates your knees, you still have many ways to build aerobic fitness, strength, balance, and mobility. Walking, cycling, swimming or water exercise, tai chi, and a tailored strengthening program are all recognized options. No single activity is proven best for everyone, so the practical choice is the one that fits your symptoms, access, preferences, and ability to continue.
The guidance below is mainly based on recommendations for knee osteoarthritis. It does not diagnose the cause of your pain or mean that every person must permanently avoid impact exercise. Persistent, severe, or limiting pain deserves an individual assessment before you change your training.
What “low impact” means for a painful knee
Low-impact exercise reduces repeated loading from landing, jumping, or running while allowing you to keep moving. It does not mean “no effort.” A brisk walk, resistance exercise, or water workout can challenge your heart and muscles without the same landing forces as running.
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Most formal guidance in this area concerns osteoarthritis. The National Institute for Health and Care Excellence (NICE), the American College of Rheumatology/Arthritis Foundation, the National Institutes of Health (NIH), the Centers for Disease Control and Prevention (CDC), and the American Academy of Orthopaedic Surgeons (AAOS) all describe exercise as part of arthritis management. Those recommendations cannot identify whether your pain comes from osteoarthritis, an acute injury, an inflammatory condition, or another problem.
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For osteoarthritis, the aim is regular activity that supports function and quality of life. NICE states: “For all people with osteoarthritis, offer therapeutic exercise tailored to their needs (for example, local muscle strengthening, general aerobic fitness).” The same guideline says supervised therapeutic exercise can be considered. That is a tailored-care recommendation, not a universal prescription for a particular number of minutes, repetitions, or pounds of resistance.
Which alternatives are available?
The table compares the main options by the issues that usually determine whether someone can start and keep doing them. The evidence does not establish a ranking from “best” to “worst.” Choose a starting point that is comfortable, accessible, and enjoyable enough to repeat.
| Option | Impact and loading | Access and cost | Useful when | Points to monitor |
|---|---|---|---|---|
| Walking | Low-impact aerobic activity; intensity changes with pace, terrain, and duration | Usually free and widely available | You can walk comfortably and want an uncomplicated outdoor or indoor activity | Hills, hard surfaces, speed, or long distances may increase symptoms |
| Stationary or recumbent cycling | Low-impact aerobic work with no running landings | Requires a gym or bike purchase; recumbent models provide more back support | You have difficulty walking or balance problems, or prefer seated exercise | Seat position, resistance, and a deep knee bend can affect comfort |
| Swimming and water exercise | Water supports body weight and can reduce joint stress | Pool access and fees vary | Land exercise is uncomfortable or you prefer a whole-body workout | Pool entry, temperature, and movements that require forceful kicking may matter |
| Tai chi | Low-impact movements with controlled weight shifting | Classes or videos may be available; cost varies | You want balance, coordination, and gentle continuous movement | Use support or a modified class if standing balance is limited |
| Strengthening | Loading is deliberate rather than repetitive impact | Body weight may be enough; bands or weights are optional | You need stronger muscles around the joint or better function | Resistance, range of motion, and technique should match your ability |
| Range-of-motion, balance, and neuromuscular work | Usually controlled and low impact | Can be done at home or with professional instruction | Stiffness, balance concerns, or movement-control goals are prominent | Use a stable support and stop an exercise that feels unsafe |
Walking: the simplest starting point
NIH, CDC, and AAOS all name walking as a low-impact option for people with arthritis. It can be done indoors, outdoors, on a treadmill, or in several short bouts rather than one long session. Start with a duration and pace you can manage today, not the distance you could walk before your knee began hurting.
How to make walking more tolerable
- Begin on a flat, predictable surface. Add hills, stairs, speed, or uneven ground only after ordinary walking is going well.
- Use a pace that lets you maintain controlled steps. A slower pace is a valid training pace while symptoms settle.
- If a continuous walk is uncomfortable, divide activity into shorter bouts during the day. The CDC recognizes short bouts as a way to accumulate activity.
- Record how your knee feels during the walk and later that day so you can identify whether duration, terrain, or speed is the main trigger.
Walking is not automatically comfortable for every knee. If even a short, flat walk is difficult, cycling or water exercise may provide an easier aerobic starting point while you arrange professional advice.
Cycling: aerobic work without running landings
NIH, CDC, and AAOS list cycling as a low-impact alternative. A stationary bike makes resistance and duration easy to control, while a recumbent bike offers a supported seat. AAOS specifically notes that stationary or recumbent bikes may help people who cannot walk well or who have balance problems.
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Choosing a setup
- Upright stationary bike: Useful if you are comfortable sitting upright and transferring on and off safely.
- Recumbent bike: The backrest and lower step-over height can make getting positioned easier for some people.
- Outdoor bicycle: Offers variety but adds balance, traffic, terrain, and mounting demands. A stationary version is easier to control while you learn your knee’s response.
Set the saddle so your knee is not forced into an uncomfortable deep bend at the top or a locked-out position at the bottom. Begin with light resistance and a smooth cadence. Increase only one challenge at a time—such as duration or resistance—so you can tell what your knee tolerates.
Swimming and water exercise
NIH describes water exercise as a way to stay active while reducing stress on joints, and both NIH and CDC include swimming or aquatic exercise among joint-friendly choices. Water can make weight-bearing movements feel easier, but a pool workout is still exercise: kicking hard, pushing off forcefully, or repeatedly climbing pool steps may not suit every person.
Ways to use the pool
- Water walking: Walk forward, backward, or sideways in chest- or waist-deep water where you feel stable.
- Aquatic exercise class: Choose an instructor who can offer lower-intensity and balance modifications.
- Swimming: Select a stroke and pace that do not provoke knee symptoms. You do not have to swim continuously; alternating easy lengths with rest is reasonable.
Check how you will enter and leave the pool. If the ladder or wet deck is a concern, ask the facility about steps, rails, or assisted access.
Tai chi and controlled movement
NIH and CDC identify tai chi as a low-impact or joint-friendly activity. Its slow transitions can combine gentle aerobic work, weight shifting, and coordination. A class may be especially useful if you want an instructor to demonstrate balance modifications.
Stand near a wall, countertop, or chair when learning. If a position requires a deeper knee bend than you can control, use a smaller range or perform the movement seated. The goal is controlled practice, not matching an instructor’s depth or speed.
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Strengthening, mobility, balance, and neuromuscular exercise
Aerobic exercise is only one part of a knee-friendly program. NIH gives weights and exercise bands as examples of strengthening tools, while the ACR/Arthritis Foundation guideline includes strengthening, walking, neuromuscular training, and aquatic exercise among reasonable options. The guideline does not establish one exercise type as superior for everyone.
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Strengthening
Strength work can target muscles that help you stand, climb, walk, and control the knee. It may use body weight, a resistance band, a machine, or free weights. Begin with a movement you can perform slowly and with stable alignment. A physical therapist can select exercises and resistance when pain, weakness, or movement uncertainty makes self-selection difficult.
Range of motion
Gentle movement through a comfortable range can address stiffness. Do not force the knee to a particular angle because a program, video, or another person reaches it. A smaller controlled range is an appropriate starting modification.
Balance and neuromuscular work
These exercises practice coordination and control rather than impact. Use a sturdy support, clear the floor, and avoid challenging balance when you are fatigued. Supervision is sensible if you have fallen, feel unstable, or cannot tell whether your knee is aligned safely.
How to choose your first activity
Use the following decision points rather than searching for a universally “best” exercise.
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- Identify the main limitation. If walking itself is difficult, try a recumbent bike or water exercise. If balance is the concern, choose a supported seated option or supervised class. If stiffness or weakness dominates, include tailored mobility and strengthening.
- Match the activity to your access. A free walking route may be more sustainable than a pool you can visit only occasionally. Conversely, a stationary bike may be practical if weather, terrain, or transportation makes outdoor walking unreliable.
- Choose an enjoyable format. CDC advises selecting activities that are enjoyable, accessible, and cause no or little pain. Adherence matters more than selecting an impressive-sounding exercise that you will abandon.
- Plan a modification. Decide in advance how you will shorten the session, lower resistance, use support, or switch to a seated version if symptoms rise.
- Reassess based on your response. Keep the activity stable while you learn your tolerance. Change duration, intensity, surface, or resistance gradually rather than changing several variables at once.
A cautious way to begin
NIH advises talking with a doctor before starting a new exercise program and starting slowly. CDC recommends paying attention to how your body feels, and NICE notes that joint pain can increase when therapeutic exercise begins. That initial increase is not permission to push through severe pain; it is a reason to adjust the activity and seek advice when the response is substantial or persistent.
- Choose one primary activity. Pick walking, cycling, water exercise, tai chi, or a supervised strengthening routine that matches your current access and symptoms.
- Use a short, manageable bout. The first session should leave you confident that you could repeat it. If you are unsure, a clinician or physical therapist can help determine a starting dose.
- Keep the effort easy to moderate at first. Avoid turning the first session into a test of what your knee can endure.
- Observe the whole response. Note symptoms during exercise, later the same day, and when you next move. Also note swelling, limping, instability, or a loss of ordinary function.
- Repeat before progressing. Consistency gives you more useful information than a single hard session. When the same activity is going well, increase a small amount—such as time, frequency, or resistance—not all of them together.
- Build a balanced week. Over time, combine an aerobic option with strengthening and, when useful, mobility, balance, or neuromuscular work. The exact mix should reflect your goals and professional advice.
Handling pain without adopting a “push through it” rule
Some discomfort may occur when therapeutic exercise starts, particularly in osteoarthritis programs. NICE also emphasizes regular, consistent exercise and long-term adherence because these can improve pain, function, and quality of life. Those statements describe a general pattern, not a target pain score or a requirement to ignore symptoms.
- Mild, settling discomfort: Consider repeating the same easier version and monitoring your response.
- Symptoms that grow during the session: Reduce range, pace, resistance, or duration, or stop that movement for the day.
- Pain that remains substantially worse or limits ordinary activity: Pause progression and obtain individualized advice.
- Persistent, severe, or function-limiting pain: Arrange a medical assessment rather than trying to solve the cause by changing exercises alone.
These recommendations are not an evaluation of an acute injury or unexplained knee pain. Do not infer from arthritis guidance that impact exercise is always harmful or that you must permanently stop running or jumping. Whether and how you return to impact activity depends on the cause of pain, recovery, strength, symptoms, and professional assessment.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When supervised exercise is the better choice
NICE recommends offering exercise tailored to each person’s needs and says, “Consider supervised therapeutic exercise sessions for people with osteoarthritis.” Supervision may be particularly useful when you need help with:
- selecting movements that fit your diagnosis, range of motion, and goals;
- adjusting a bike, band, machine, or other equipment;
- progressing resistance without provoking a flare;
- addressing weakness, balance problems, or movement-control concerns; or
- deciding how to modify activity when symptoms change.
A physical therapist, physician, or qualified exercise professional can tailor a program. Ask for help if pain is persistent, severe, or limiting, or if you are uncertain whether a symptom is safe to exercise through.
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Optional equipment: what is useful and what is not required
Resistance bands
Resistance bands are an optional strengthening tool. NIH lists exercise bands among ways to strengthen affected joints, and the ACR/Arthritis Foundation guideline discusses elastic-band resistance training among studied approaches. A band is not a treatment by itself, and no particular resistance, color, or brand is universally appropriate.
Choose resistance that lets you move slowly and maintain control. If the band causes sharp pain, makes you compensate, or prevents a full controlled repetition, use less resistance or ask a professional to check the exercise. You can begin with body-weight movements when that is more comfortable.
Stationary or recumbent bike
A bike can be valuable when you prefer cycling or cannot walk comfortably, but it is not essential. A gym trial or a supervised session can help you determine whether the seat, pedal position, and resistance suit you before buying equipment.
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Water exercise requires a safe, accessible pool; it is not automatically the cheapest or easiest option. Consider travel, entry and exit arrangements, supervision, and ongoing fees when deciding whether you can use it consistently.
What the evidence does—and does not—say
The ACR/Arthritis Foundation guideline says available evidence does not establish a hierarchy among exercise types and highlights personal preference and access. That is why this article presents alternatives rather than naming one winning exercise.
A 2019 ACR/Arthritis Foundation guideline notes an estimate of 302 million people worldwide living with osteoarthritis. That figure is a secondary-reported estimate in that guideline, not a newly measured 2026 count, so it should not be read as a current global census.
The available guidance also does not provide a universal return-to-running schedule, an exercise dose that fits every knee, or proof that a particular piece of equipment treats knee pain. It supports a process: choose a tolerable activity, begin gradually, adapt it to your needs, and obtain help when symptoms or uncertainty warrant it.
A practical selection checklist
Before your next session, ask:
- Can I access this activity reliably enough to repeat it?
- Can I perform it without unsafe balance demands or uncontrolled knee movement?
- What is the easiest version—shorter, slower, seated, supported, flatter, or less resistant?
- How will I record my knee’s response during the session and afterward?
- What change will I make if symptoms increase?
- Do I need a clinician or physical therapist to tailor this safely?
For many people, the best alternative to running or jumping is not one replacement exercise but a sustainable combination: an aerobic option such as walking, cycling, or water exercise, plus appropriately tailored strengthening and movement practice. The right combination is the one that respects your current symptoms and keeps you participating consistently.
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