1. Over wait

Over weight is one of the largest risk factors for knee pain. The knee supports much of the body’s weight, and too much weight taxes the joint and increases the likelihood of pain. Anterior knee pain, which develops at the front and center, is one of the more common types of knee pain associated with carrying extra weight. Inactivity or muscle weakness, both associated with being overweight, can exacerbate the condition.Obesity stresses the structure of the knee, including the patella—the medical term for the kneecap. 

2. Muscle weakness

The knee connects the thighbone—also known as the femur—to the shinbone—also known as the tibia. Having strong quadriceps muscles helps to stabilize the knee joint and keep it healthy.And improving muscular fitness can be one of the best ways how to prevent knee pain, even if you’re older. However, strong quadriceps and hamstring muscles can help insulate the knee from stress.

3. Inactivity/lack of mobility

A cause of muscle weakness and obesity—inactivity—is also another factor for knee pain. People who are inactive are less strong, less flexible, and more sedentary. When the time comes to move and exercise, there is a greater risk of injury.Inactivity has also been found to make knee pain from arthritis worse. Being sedentary results in muscle deterioration that weakens the knee and increases pain

4. Not resting after injury

Injured people who don’t rest their knees for a long enough period of time increase their risk of re-injury. Although recovery periods can last anywhere from several weeks to several months, taking the time to allow the body to adequately repair and heal is critical for allowing the knee to regain its strength.Resting is particularly difficult for athletes and other active people, but spending some quality time on the couch will go a long way to keeping the knees healthy and protecting against future injury.

5. Smoking

Smoking increases the risk of a host of health problems, and knee pain can be added to the list. Quitting smoking is one of the best ways how to prevent knee pain when you get older. smoking increased the risk for both cartilage loss and knee pain in men who had developed osteoarthritis in the knee. Because smoking affected the amount of cartilage the men had in their knees, it increased the amount of pain they experienced.