Though cycling is considered a low-impact activity, there’s still plenty of room for mistakes. Let’s first pinpoint where pain is coming from and then find out what we can do about it. There are five types of discomfort and knee pain after biking:
- Posterior knee pain (back of the knee)
Pain at the back of the knee – or posterior knee pain - is usually due to excessive strain on your hamstring – back
of your thigh - (or occasionally, the calf) tendons at their attachment points at the back of the knee. This issue is usually caused by a saddle that is positioned too high or set too far back, leading to knee overextension at the bottom of the pedal stroke.
- Anterior knee pain (in front of the knee)
Pain in front of the knee (anterior knee pain) is the most common, with the main issue being at the patellofemoral joint. Less common sources of anterior knee pain include issues with the patella tendon (quads), bursas surrounding the knee or the fat pad. Patellofemoral pain is quite a vague discomfort beneath or around the kneecap (patella), and it often happens during or after loading. Normally the kneecap moves along the thigh bone (femur) - or ‘tracks’ in the trochlear groove when you use your leg, however, pain can occur when there is excess pressure on a specific part of the joint. Excess pressure and incorrect ‘patellar tracking’ are usually due to weakness or inadequate activation of the vastus medialis oblique (VMO) muscle located on the inner quad. Annoyingly, pain or swelling in the knee can further hinder VMO function and make posterior knee pain worse.
- Lateral and medial knee pain (outer side of the knee and inside)
Outer side of the knee and inside knee pain (lateral and medial knee pain) is usually caused by the compression of the iliotibial band (ITB) where it attaches to the side of the knee. It happens if there are muscle imbalances around the hip, inadequate control of knee rotation, or incorrect stance width and saddle positioning. Medial knee pain (on the inner side of the knee), is typically caused by swollen tendons that attach to the inner knee, these include the sartorius, gracilis, and semimembranosus. Like outer-side knee pain, this is also usually caused by a lack of control of knee rotation and inappropriate stance width, which leads to excessive inward rotation and dropping of the knee.
- Spring knee pain (just above the front of the knee)
A pain just above the kneecap – or spring keen pain – is often caused by overloading. It’s often worse when climbing hills, or pedaling in higher gears, when the load on the joint and muscles is more. Again, it can be due to muscle imbalances – often more powerfuI quad muscles (thigh), which are used for powerful pedaling. Sometimes adjusting your saddle height and its position to be nearer or further from the handlebars, can improve your riding position and reduce the pain.
- Weak core pain (usually associated with back pain)