Based on your description, pain at the back of the knee that increases with walking and difficulty bending fully may be related to irritation of the hamstring tendons, popliteal region strain, or early knee joint inflammation. Sometimes tight hamstrings or calf muscles can also create heaviness in the leg after walking.
Next Steps
Activity modification: Avoid deep squatting, stair overuse, and sudden long walks for a few days.
• Paced walking: Since symptoms start after 400–500 m, try walking shorter distances (200–300 m) with rest intervals.
• Cold pack: Apply ice behind the knee for 10–15 minutes, 2–3 times daily to reduce irritation.
• Gentle stretching: Light hamstring and calf stretches can help reduce tension behind the knee.
• Quadriceps strengthening: Simple exercises like straight leg raises and static quadriceps can support the knee joint.
• Check footwear: Shoes with good cushioning and arch support help reduce knee loading during walking.
Health Tips
Avoid deep squatting, kneeling, or sudden twisting movements of the knee until the pain reduces.
• Apply a cold pack behind the knee for 10–15 minutes, 2–3 times daily to help reduce irritation.
• Do gentle hamstring and calf stretching to reduce tightness in the muscles at the back of the knee.
• While walking, try shorter distances with rest breaks instead of continuous long walks.
• Wear supportive footwear with good cushioning and arch support to decrease stress on the knee joint.
• Avoid forcing the knee to bend fully if it causes pain. Gradual movement is better than pushing the range.