Strengthen
your knees,
run pain-free

Runner's knee — medically known as patellofemoral pain syndrome (PFPS) — is a dull, aching pain felt at the front of the knee, around and behind the kneecap. It accounts for approximately 25% of all running-related injuries, making it the single most common complaint among runners.

What causes it?

The kneecap (patella) sits in a groove at the end of the femur and glides up and down as you bend and straighten your leg. When the surrounding muscles — particularly the quads, glutes, and hip stabilisers — are weak or imbalanced, the kneecap tracks poorly, grinding against cartilage and causing inflammation and pain.

The most common triggers are overuse — too much distance, intensity, or frequency too quickly — plus weakness in the hip and quad muscles, and poor running biomechanics.

Why strengthening works

Technically, you can't strengthen the knee joint itself — it's the muscles surrounding it that matter. The more load those muscles can absorb, the less stress lands on the joint. Strong quads stabilise the kneecap. Strong glutes keep the pelvis level and prevent the knee from collapsing inward. Strong hamstrings balance the pull on the joint from behind.

The muscles you'll be training

• Quadriceps — extend the knee and stabilise the kneecap
• Gluteus maximus & medius — control hip alignment, preventing knee cave
• Hamstrings — balance the quad pull, flex the knee
• Hip flexors & abductors — stabilise the pelvis during single-leg loading
• Calves & ankles — absorb ground forces before they reach the knee

How to use this program

The program runs you through all 7 exercises in a circuit, completing 3 full rounds. Exercises 2 and 3 (Reverse Towel Lunge and Single-Leg Deadlift) are prescribed for 1–2 sets, so they appear only in rounds 1 and 2.

Runner's World recommends doing this routine twice a week. If you're already in pain, replace your scheduled runs with this. If you're preventing future injury, do it on easy running or rest days. Start with bodyweight and add resistance only once your form feels solid.

What to expect

Most runners notice reduced pain and improved stability within 4–6 weeks of consistent training. The key is consistency — hence the streak tracker. You're building new movement patterns and muscle capacity, which takes time and repetition.