Knee Osteoarthritis: How Exercise Reduces Pain and Improves Function

Knee osteoarthritis does not mean you should stop moving. The right type of activity usually improves pain, function, and mood.

Core principle

Joint-friendly movement is medicine for osteoarthritis when done consistently and progressively.

4 exercise pillars

1) Aerobic activity

• Walking, cycling, or pool exercise.
• Start with 10 minutes and build to 30 minutes most days.

2) Strength training

• Prioritize quadriceps, glutes, and calf strength.
• Examples: sit-to-stand, mini-squat, step-up, resisted knee extension.

3) Flexibility

• Gentle daily range-of-motion and calf/hamstring stretches.

4) Balance and control

• Single-leg stance with support.
• Controlled step-down practice.

Weekly starter schedule

• 3 days strength.
• 5 days walking or low-impact cardio.
• Daily flexibility (5 to 10 minutes).
• 2 to 3 balance sessions.

Pain-monitoring rule

• Mild discomfort during exercise can be acceptable.
• Symptoms should settle by the next day.
• If pain clearly worsens for more than 24 hours, reduce intensity and volume.

Weight and load management

Small reductions in body weight can lower knee joint load and help symptoms over time.

When to check with your clinician

• Sudden swelling after minor activity.
• Recurrent knee locking or giving way.
• Persistent night pain.

References

• CDC: About Physical Activity and Arthritis: https://www.cdc.gov/arthritis/prevention/index.html
• NICE osteoarthritis recommendations: https://www.nice.org.uk/guidance/ng226/chapter/1-Recommendations

This article is educational and not a substitute for personalized assessment.