The vastus medialis oblique (VMO) is a small, but important, muscle located in the thigh. It is part of the quadriceps muscle group and is responsible for extending the knee joint. This muscle is especially important in the treatment of knee pain and dysfunction, as it helps stabilize the patella (kneecap) during movement. In this article, we will explore the role of the VMO in the body, why it is vital for human biomechanics, and two conservative ways of strengthening it when in chronic pain.
Role of the Vastus Medialis Oblique
The VMO is located on the inside of the thigh, next to the knee joint. It is one of four muscles that make up the quadriceps muscle group, along with the rectus femoris, vastus lateralis, and vastus intermedius. The VMO has a unique fibre orientation that allows it to pull the patella medially (towards the inside of the knee), helping to stabilize the kneecap during movements such as walking, running, and jumping. It also plays a role in knee extension and is activated during activities that require strong knee extension, such as squatting and lunging.
VMO and Knee Pain
Knee pain is a common complaint among athletes and non-athletes alike. One of the most common causes of knee pain is patellofemoral pain syndrome (PFPS), which is often caused by an imbalance in the quadriceps muscle group. Weakness or tightness in the VMO can lead to improper tracking of the patella, causing irritation and inflammation of the joint. This can result in pain, stiffness, and swelling in the knee.
Strengthening the VMO
Strengthening the VMO is an important aspect of treating knee pain and dysfunction. Two conservative ways of strengthening the VMO when in chronic pain are:
Isometric Exercises: Isometric exercises involve contracting the muscle without moving the joint. To perform an isometric exercise for the VMO, sit with your legs straight out in front of you and place a rolled-up towel under your knee. Contract the VMO muscle by pushing your knee down into the towel and holding for 5-10 seconds before releasing. Repeat for several repetitions.
Terminal Knee Extension Exercises: Terminal knee extension exercises involve extending the knee against resistance. To perform a terminal knee extension exercise for the VMO, attach a resistance band to a sturdy object and wrap the other end around your ankle. Stand with your feet hip-width apart and your knees slightly bent. Extend your knee against the resistance band while keeping your foot turned inward. Repeat for several repetitions.
In conclusion, the VMO plays a vital role in human biomechanics and knee health. Strengthening the VMO can help alleviate knee pain and improve function. Isometric exercises and terminal knee extension exercises are two conservative ways of strengthening the VMO when in chronic pain. However, it is important to consult with a healthcare professional before starting any exercise program to ensure it is appropriate for your individual needs.