- Regular movement keeps joints lubricated and strengthens the muscles that support the knee.
- Low-impact activities such as walking, swimming, cycling, pilates and yoga reduce load on sore or weak knees.
- Warming up before exercise and stretching afterwards helps prevent strains and supports recovery.
- A healthy body weight, balanced diet and good hydration all protect cartilage and joint tissue.
- Cushioned footwear, knee pads and sports protective gear lower your risk of knee injury.
- Persistent knee pain, swelling or instability should be assessed by a medical professional.
Many of the things we do every day quietly place stress on our joints, and the knees carry more of that load than most. The good news is that joint health responds well to small, consistent habits: how you move, what you eat, and even the shoes you choose all make a difference.
Below are practical, evidence-informed ways to protect your joints, keep your knees strong and reduce your risk of injury.
What Are Healthy Joints?
A healthy joint is one where the cartilage lining the bone surfaces remains smooth, and thick, the surrounding ligaments and muscles provide stability, and synovial fluid lubricates movement. When cartilage wears down or the supporting muscles weaken, pain, stiffness and reduced range of motion follow.
1. Stay Physically Active
Regular movement is essential for joint health. It strengthens the muscles around the knee and hip and helps keep the joint lubricated and nourished.
- Aim for moderate exercise several times a week.
- Include strength training that targets the glutes, hamstrings, calves and quadriceps.
- Remember that stronger muscles absorb force and reduce the load transferred through the knee joint.
2. Prioritise Low-Impact Activities
If your knees already feel weak, sore or swollen, low-impact exercise lets you stay fit without adding strain.
High-Impact Versus Low-Impact Exercise
| Factor | Low-Impact Activity | High-Impact Activity |
| Examples | Walking, swimming, cycling, yoga, water aerobics | Running, basketball, netball, tennis, jumping sports |
| Load through the knee | Lower and more evenly distributed | Higher, with repeated shock loading |
| Best suited to | Sore or arthritic knees, return to exercise, older adults | Healthy knees with good strength and technique |
| Injury risk | Generally lower | Higher risk of ligament, meniscal and cartilage injury |
3. Practise Regular Stretching
Exercising without a proper warm-up is a common cause of knee injury. Warming up increases blood flow to the muscles and prepares the joint for movement.
- Begin with five to ten minutes of gentle movement to raise your heart rate.
- Use dynamic stretches such as leg swings and controlled lunges before activity.
- Cool down afterwards with slower static stretches to release muscle tension and aid recovery.
4. Manage Your Body Weight
Even a modest amount of excess body weight increases the pressure travelling through your knee joints with every step. Maintaining a healthy weight relieves that stress and improves overall joint function, and it is one of the most effective ways to slow the progression of knee arthritis. If you are overweight losing 5-10kg can make a very big difference to your knee symptoms.
5. Maintain a Healthy Lifestyle
Alongside regular exercise, a balanced diet supports the bone, cartilage and soft tissue around your joints.
- Foods rich in omega-3 fatty acids, calcium and vitamin D help reduce inflammation and support strong bones.
- Fruit and vegetables supply antioxidants that help protect joint tissue from damage.
- Staying well hydrated helps maintain the cushioning fluid within your joints.
- Smoking can impair healing and is associated with poorer joint and bone health.
For general guidance on physical activity levels for adults, the Australian Government Department of Health publishes national physical activity and exercise guidelines.
6. Invest in Protective Clothing and Equipment
The right equipment supports long-term joint health and reduces the chance of a sudden injury.
- Well-cushioned shoes absorb shock and distribute pressure, which matters most during running and other repetitive activity.
- Knee pads protect the joint during kneeling tasks such as gardening, cleaning or flooring work.
- Sport-specific protective gear is worth wearing for contact games such as football or hockey.
7. Understand Your Body
You know your body better than anyone, so pace yourself and pay attention to the signs of overexertion. Do not push through excessive pain. Locking, giving way, or swelling that returns after activity can indicate a cartilage or ligament problem such as a meniscal tear, and these symptoms are worth having assessed rather than ignoring.
When to See a Knee Specialist
Book an assessment if you experience any of the following:
- Knee pain that persists for more than a few weeks despite rest.
- Swelling that recurs after everyday activity.
- A knee that catches, locks or feels like it may give way.
- Difficulty with stairs, kneeling or walking short distances.
- Knee pain that keeps you awake at night.
- Knee pain that interferes with everyday activities.
A consultation can identify the underlying cause and confirm whether non-surgical care or one of the available knee treatment options is appropriate for you.
Maintaining Healthy Joints and Preventing Knee Injuries: Final Thoughts
Protecting your joints is not a one-off exercise. It takes time, motivation and a degree of forward planning to stay fit and active for years to come. Frequent low-impact exercise, healthy lifestyle choices such as a balanced diet and adequate hydration, and consistent stretching all support joint health.
Protective equipment such as cushioned sports shoes and knee guards further reduces your risk of injury. Above all, you know your body best, so when something does not feel right, seek support from a medical professional.
Frequently Asked Questions
What is the best exercise for healthy knees?
Low-impact exercise combined with strength training is best for knee health. Walking, swimming and cycling maintain fitness without heavy joint loading, while strengthening the quadriceps, hamstrings and glutes reduces the force transmitted through the knee.
Does cracking or clicking in the knee mean joint damage?
Painless clicking is usually harmless and often comes from tendons moving over bone. Clicking that is accompanied by pain, swelling, catching or locking is different and should be assessed, as it can indicate cartilage or meniscal injury.
How much weight loss helps knee pain?
Even small reductions in body weight can meaningfully reduce the load passing through the knee, because the joint carries several times your body weight during walking and stair climbing. Losing 5-10% of your body weight has been shown to make a significant difference to knee pain.
Can knee injuries be completely prevented?
No, but the risk can be significantly reduced. Warming up properly, building muscle strength, using correct technique, wearing supportive footwear and avoiding sudden increases in training load all lower the likelihood of injury.
