Does Leg Muscle Help Running

As a runner, one of the questions that has always intrigued me is how much leg muscle actually helps with running performance. Over the years, I have heard various opinions on this matter, with some claiming that strong leg muscles are essential for running while others argue that it’s all about aerobic capacity and technique. In this article, I will delve into the science behind leg muscle and its impact on running.

The Anatomy of Leg Muscles

Before we dive into the role of leg muscles in running, let’s first understand the different muscles involved. The major muscles in the legs that contribute to running are the quadriceps, hamstrings, calves, and glutes.

The quadriceps, located in the front of the thigh, are responsible for extending the knee and provide power during the push-off phase of running. The hamstrings, situated at the back of the thigh, help flex the knee and play a crucial role in decelerating the leg during the swing phase. The calves, consisting of the gastrocnemius and soleus muscles, aid in propelling the body forward by extending the ankles. Lastly, the glutes, which include the gluteus maximus, medius, and minimus, stabilize the pelvis and provide power during hip extension.

The Role of Leg Muscles in Running

Now that we have a basic understanding of leg muscle anatomy, let’s explore how these muscles contribute to running performance.

1. Power Generation: Leg muscles, specifically the quadriceps and glutes, are responsible for generating the power needed to propel the body forward during each stride. The stronger these muscles are, the more force they can produce, resulting in faster and more efficient running.

2. Energy Storage and Release: The leg muscles act as elastic springs, storing and releasing energy with each stride. Particularly, the calf muscles play a vital role in energy storage as they absorb and release energy during the push-off phase, assisting in forward motion.

3. Injury Prevention: Strong leg muscles provide stability and support to the joints, reducing the risk of common running injuries such as knee pain, shin splints, and IT band syndrome. Additionally, a well-balanced combination of leg muscles ensures proper alignment and reduces the load on particular structures, contributing to injury prevention.

The Importance of Strength Training

While leg muscles naturally develop from the repetitive motion of running, incorporating strength training exercises can further enhance their power and endurance. Strength training exercises like squats, lunges, and deadlifts target the major leg muscles, helping to build strength and improve running performance.

Furthermore, strengthening the leg muscles can assist in maintaining proper running form as fatigue sets in during longer runs. Fatigue often leads to a breakdown in running mechanics, which can increase the risk of injury. Strong leg muscles act as a buffer, providing support and reducing the strain on other muscles that may compensate for weaker areas.


After delving into the significance of leg muscle in running, it’s clear that strong leg muscles play a vital role in improving performance and reducing the risk of injuries. By incorporating strength training exercises into your running routine, you can enhance power generation, energy storage, and injury prevention. Remember, it’s not just about aerobic capacity and technique; leg muscles are an essential component of becoming a stronger and more efficient runner.