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Why Running Isn't Bad for Your Knees

woman and man running on gravel trail

Running has long been criticized as a high-impact activity that harms the knees. However, recent research and expert opinions shed light on the misconception surrounding this popular form of exercise. In this blog post, we will explore why running isn't bad for your knees and how it can actually promote knee health when performed correctly. Let's lace up our shoes and dive into the truth about running and knee health.

1. Understanding the Knee Joint:

To understand the relationship between running and knee health, it's important to grasp the structure and function of the knee joint. The knee joint is a remarkable and complex structure that allows for mobility and stability during various movements, including running. It comprises bones, ligaments, tendons, muscles, and cartilage, all working together to support the body's weight and facilitate smooth motion.

The knee joint consists of the femur (thigh bone), tibia (shin bone), and patella (kneecap), with several ligaments connecting these structures. Ligaments, such as the anterior cruciate ligament (ACL) and medial collateral ligament (MCL), provide stability and prevent excessive movement in the joint. Tendons, such as the patellar tendon, connect the muscles to the bones, enabling the knee to bend and straighten.

Additionally, the knee joint has cartilage known as the menisci, which act as shock absorbers and provide cushioning between the bones. The articular cartilage covers the surfaces of the bones, allowing them to glide smoothly during movement. Maintaining the integrity of these structures is essential for healthy knee function.

2. Dispelling the Myth:

Contrary to popular belief, running, when performed correctly, does not inherently damage the knees. Several scientific studies have shown that running does not increase the risk of developing knee osteoarthritis or other knee-related issues in healthy individuals. In fact, running can have numerous benefits for knee health, including improved joint stability, stronger muscles, and increased bone density.

3. The Importance of Proper Technique and (Bio)Mechanics:

While running itself isn't detrimental to the knees, poor running form and technique can lead to unnecessary stress on the joints. It's essential to maintain proper posture, stride length, and foot strike pattern to minimize impact and reduce the risk of knee injuries. Engaging in strength and flexibility exercises, as well as gradually increasing mileage and intensity, can further protect the knees during running.

Proper alignment and biomechanics play a crucial role in maintaining knee health during physical activities like running. When the alignment is correct, the forces applied to the knee joint are distributed evenly, reducing the risk of excessive stress on specific structures.

Biomechanics refers to the study of how the body moves and the forces acting on it. In the context of running, having proper biomechanics means adopting efficient running form and technique. When running, the knees should be aligned with the hips and feet, and the impact forces should be appropriately absorbed by the muscles and joints.

4. Strengthening the Supporting Muscles:

One of the key factors in preserving knee health is strengthening the supporting muscles. While running primarily involves the lower body, it's important to understand that the muscles surrounding the knees play a significant role in providing stability and absorbing shock during the impact of each stride. By incorporating strength training exercises into your routine, you can build a robust musculoskeletal system that supports your knees and minimizes the risk of injury.


The quadriceps, a group of muscles located at the front of the thigh, are vital in maintaining knee stability during running. These muscles, including the vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris, work together to control the movement of the knee joint and provide strength for movements like extending the leg. Strengthening the quadriceps can help balance the forces acting on the knee, reducing stress on the joint.

Exercises such as squats, lunges, and leg presses are excellent for targeting the quadriceps. Start with bodyweight exercises and gradually increase resistance by using dumbbells, barbells, or resistance bands. It's important to maintain proper form throughout each exercise and avoid excessive loading to prevent undue stress on the knees.


The hamstrings, located at the back of the thigh, are another group of muscles that play a crucial role in knee stability. They work in conjunction with the quadriceps to control knee movement and provide support during running. Weak hamstrings can contribute to imbalances in the muscles around the knee, leading to instability and increased risk of injury.

To strengthen the hamstrings, exercises such as hamstring curls, deadlifts, and glute-ham raises are effective. These exercises can be performed using machines, free weights, or resistance bands. It's important to focus on proper technique and gradually progress the difficulty and resistance as your strength improves.

Hip Muscles:

The hip muscles, including the gluteus maximus, gluteus medius, and hip adductors and abductors, are often overlooked when it comes to knee health. However, these muscles play a significant role in providing stability and controlling the movement of the lower limbs. Weak hip muscles can result in poor alignment and increased stress on the knees during running.

Exercises such as hip bridges, lateral leg raises, and clamshells can help strengthen the hip muscles. These exercises target the glutes and hip abductors, which are important for maintaining proper alignment and reducing strain on the knees. Incorporating exercises that target the hip muscles into your routine can improve overall lower body strength and stability, ultimately benefiting the health of your knees.

Remember, when engaging in strength training exercises, it's essential to focus on proper form, gradually increase intensity and resistance, and allow for adequate rest and recovery. If you're new to strength training or have concerns about your knee health, consult with a qualified fitness professional or physical therapist who can provide guidance and ensure you're performing the exercises correctly.

By incorporating strength training exercises that target the quadriceps, hamstrings, and hip muscles into your routine, you can develop a strong and balanced musculoskeletal system that supports your knees. Strong muscles provide stability, absorb shock, and distribute forces effectively, minimizing the risk of knee injuries during running. Prioritize strength training alongside your running routine to enhance your overall performance and promote long-term knee health.

5. Mobility Matters:

When it comes to running, having good mobility in the joints of your lower half is crucial for maintaining proper biomechanics, reducing the strain on your knees, and enhancing overall performance.

Hip mobility is essential for generating power and maintaining efficient running form. Adequate hip mobility allows for a full range of motion during the running stride, enabling you to extend your leg behind you and propel yourself forward. When the hip joints are stiff or lack mobility, compensatory movements may occur, leading to altered running mechanics and increased stress on the knees. By incorporating exercises that promote hip mobility, such as hip flexor stretches, glute stretches, and dynamic warm-up routines, you can improve your running efficiency and reduce the risk of knee injuries.

Similarly, maintaining proper ankle mobility is crucial for a smooth and efficient running gait. The ankle joint needs to have sufficient mobility for effective push-off and shock absorption. Limited ankle mobility can lead to compensatory movements, such as overpronation (excessive inward rolling of the foot) or inadequate foot strike, which can place added stress on the knees. Performing ankle mobility exercises, such as ankle circles, calf stretches, and heel drops, can help improve ankle range of motion and support optimal running mechanics.

Additionally, don't overlook the importance of foot mobility in running. The foot plays a vital role in absorbing impact forces and adapting to various surfaces during running. Maintaining good foot mobility helps distribute forces evenly and reduces the risk of overloading specific areas, including the knees. Exercises that promote foot mobility, such as toe curls, toe scrunches, and calf raises, can enhance the flexibility and strength of the foot muscles, improving your overall running performance and minimizing knee strain.

Incorporating mobility exercises specific to the hip, ankle, and foot into your running routine can help optimize your running mechanics, reduce the load on your knees, and improve your overall running experience. Remember to start gradually and consult with a physical therapist if you have any concerns or specific mobility limitations. By prioritizing mobility alongside your running training, you can enjoy the benefits of running without worrying about detrimental effects on your knees.

6. Listening to Your Body:

While running is generally safe for the knees, it's important to listen to your body and address any warning signs of discomfort or pain. Gradual progression, adequate rest, and proper recovery are crucial to preventing overuse injuries. If you experience persistent knee pain or have a history of knee issues, consulting with a healthcare professional or a physical therapist can provide personalized guidance and help address any concerns.

7. Rest and Recovery

When you engage in repetitive and high-impact activities like running, your body undergoes stress and strain. Allowing sufficient rest and recovery time allows your muscles, tendons, and ligaments to repair and rebuild, reducing the risk of overuse injuries. Rest days give your body the opportunity to adapt, improve its strength, and enhance performance. Additionally, proper recovery strategies such as adequate sleep, hydration, nutrition, and incorporating activities like stretching and low-impact cross-training can promote muscle recovery, reduce inflammation, and prevent the accumulation of fatigue. Prioritizing rest and recovery in your running routine is essential for long-term injury prevention and overall well-being.

8. Importance of Conditioning and Gradual Progression:

To ensure optimal knee health while running, it's crucial to engage in conditioning exercises and follow a gradual progression. Conditioning exercises help improve muscle strength, flexibility, and endurance, which can enhance the stability of the knee joint. Strengthening the muscles around the knee, such as the quadriceps and hamstrings, can provide added support and reduce the risk of injury.

Gradual progression is essential for allowing the body to adapt to the demands of running. It involves gradually increasing the duration, intensity, and frequency of your runs to avoid overloading the knee joint. This approach allows the muscles, tendons, and ligaments to adapt and strengthen gradually, reducing the risk of overuse injuries.

9. Seeking Professional Guidance:

If you're new to running or have concerns about your knee health, seeking guidance from a qualified physical therapist can be beneficial. They can assess your running form, biomechanics, and provide personalized recommendations to optimize your running technique and prevent knee-related issues. Additionally, they can guide you in designing a comprehensive training program that incorporates strength training, flexibility exercises, and proper rest and recovery.

Remember, every individual is unique, and what works for one person may not work for another. It's essential to listen to your body, pay attention to any pain or discomfort, and make adjustments as necessary. By taking a proactive approach to knee health and implementing the necessary precautions, you can enjoy the benefits of running while minimizing the risk of knee injuries.

Running, when approached with proper technique, gradual progression, and attentiveness to the body's signals, can be a safe and beneficial form of exercise for knee health. Debunking the myth that running is bad for the knees allows individuals to embrace this enjoyable activity and reap the numerous physical and mental health benefits it offers.

Remember, if you have specific concerns about your knee health or any pre-existing conditions, it's always wise to consult with a healthcare professional or a sports medicine specialist, such a fitness based physical therapist like those at Nashville PT, who can provide personalized advice based on your unique circumstances.


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