"People who have knee arthritis are often scared to exercise because they think they will hurt themselves, but the condition will only get worse if people don't get moving," said Valerie Walkowiak, medical integration coordinator at the Loyola Center for Fitness.

"The best way to start is to talk to your doctor about exercising and then work with a therapist or personal trainer to establish guidelines.

Be proactive and take it one step at a time." Some of the benefits of exercise for knee arthritis sufferers include:

1. Preserving and restoring range of motion and flexibility around each affected joint

2. Increasing muscle strength and endurance to enhance joint stability

3. Increasing aerobic conditioning to improve psychological state and decrease risks of disease

4. Knee pain relief and reduce inflammation According to Walkowiak the best exercise routine will depend on what type of arthritis has been diagnosed.

The most common form of arthritis is osteoarthritis, when the knee cartilage begins to break down leaving the joint with no cushion between bones. Though the specifics will depend on the person, all exercise programs should include stretching, knee strengthening and low-impact aerobic exercise.

For all knee arthritis suffers the most beneficial exercise will be gentle motion like biking without any intensity. Muscle strength training also is important for improving daily function. Be careful when starting a weight-training routine. Use light resistance with minimal repetitions.

Lift weights 2-3 times a week with a day of rest between to allow for muscle recovery. One should not experience knee pain when performing exercises. "Knee arthritis affects people in all age groups and fitness levels.

The activities that an individual will be able to perform will depend on their current fitness level," said Walkowiak. Low-impact aerobic exercise is safe for people with arthritis and is beneficial in helping with pain control and improve daily function.

"Start slow with 10-15 minutes of aerobic exercise every other day to see how it impacts your body. As your body adapts to the new routine, gradually increase duration to 30-45 minutes," said Walkowiak.

Some low-impact exercise ideas include: - Aquatic exercise - Walking - Stationary bikes - Gardening (depending on affected joint) - Lap swimming maybe - Yoga - Tai-Chi - Water aerobic classes Walkowiak suggests always listening to your body and not pushing yourself too far, which can lead to further knee injury. Here are a few more tips to keep in mind when starting an exercise routine:

1. Get professional advice from your Doctor and set guidelines before starting a program

2. Listen to your body. Pain is not a part of being fit

3. Don't exercise during an arthritis flareup

4. Start slow and progress as you go

5. Always warm up properly before you begin including stretching and walking for a few minutes.

"If we don't keep our bodies healthy and active we can lose function as we age. We all want to be independent and able to care for ourselves and by being proactive now we can make that a reality for a long time," said Walkowiak.