Victor Forge
Running is a high-intensity activity that engages multiple muscle groups. It is a form of cardiovascular exercise that increases heart rate and boosts metabolism, aiding in weight loss. Running works your legs, specifically your quads, hamstrings, and calves, as well as your hips and glutes. Your inner thighs, abs, and shoulders also play a supporting role. The degree of muscle engagement depends on your speed and terrain. For example, running uphill requires more engagement from the gluteus maximus, while downhill running demands more from the quadriceps.
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What You'll Learn
Hip flexors
The hip flexors are a group of muscles that allow bending at the hip, making them essential for everyday movement. They are especially important when running, as they help to drive your legs forward. The hip flexors are located at the front of your hips, right above your thighs. They connect your thighbone to your low back, hips, and groin.
The primary hip flexors are the psoas major and the iliacus, which, collectively, are often called the iliopsoas. The psoas originates from the lower six vertebrae of your spine, while the iliacus originates from the inside bowl of your pelvis. They meet and insert at the top of the femur, or upper leg bone. The iliopsoas works to stabilize the trunk during activities such as lifting, pushing, and pulling. It also draws the knees toward the chest, as in kicking movements in sports such as soccer.
Tightness and weakness in the hip flexors can cause lower back pain, hip pain, and injury. This can be caused by a sedentary lifestyle, where sitting for long periods can make the hip flexors weak and tight. The tighter and shorter the hip flexor, the more reduced your range of motion becomes, and the shorter your stride becomes. This can hinder your natural gait and affect your form, reducing your running economy and potentially leading to pain and injury.
To strengthen your hip flexors, you can try exercises such as lunges, knee raises, squats, and the plank hip flexion exercise. These exercises will help improve your mobility, build strength, and prevent injuries.
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Gluteal muscles
The gluteal muscles are essential for stabilising the entire lower limb while running. They are the primary muscles that help support the lower limb and are located on the back and sides of the pelvis.
The gluteal muscles work to extend the hip, propelling the body forward and promoting a powerful stride. They also support the femur, preventing the knee from caving inwards when striking the ground. The gluteus maximus is the largest of the gluteal muscles and is important for extending the leg backward when running. It is also key for reaching top speed. The gluteus medius and minimus are the prime lateral movers for the legs, helping to maintain a neutral base while running. They limit side-to-side motion and prevent the hip from dropping.
Weak or inhibited gluteal muscles can result in injuries for runners. Without adequate strength in the gluteus medius, the femur can become misaligned and drop inwards during running, causing the knee and ankle to also drop inwards. This can lead to possible cartilage damage, runner's knee, and over-pronation of the foot, resulting in issues such as shin splints or plantar fasciitis.
To improve gluteal strength, it is important to learn how to consciously engage the gluteal muscles and understand what it feels like to activate them. Exercises such as squats, deadlifts, and lunges are often used to train the gluteal muscles, but it is crucial to focus on the basics and build a solid foundation of good firing patterns before progressing to more functional exercises. Posture is also key to effectively engaging the gluteal muscles while running, specifically the way the pelvic and lumbar regions are held and controlled.
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Quadriceps
The quadriceps are heavily engaged during sprinting and uphill running, as these activities require greater knee drive. However, downhill running is even more demanding on the quads, as they have to perform strong eccentric contractions (when the muscle lengthens) to help control your speed and prevent you from falling. Running downhill helps build strength and power in your legs, which can improve your running performance.
Additionally, quad-strengthening exercises can improve endurance and reduce leg fatigue. For example, lunges and knee raises are simple exercises that can help strengthen the quadriceps.
It is important to keep the quadriceps strong and healthy, as they work together with other muscle groups to maintain stability, proper form, and spinal alignment. This helps runners perform at their highest capacity with maximum efficiency and prevents injuries.
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Hamstrings
Running is a whole-body workout, but it primarily works the core and lower-body muscles. The hamstrings are three muscles located on the back of the thigh, between the hips and knees. They work to bend the knee and pull the leg backward, and are essential for force production in the push-off phase of the stride.
The hamstrings are key to sprinting and accelerating, and they help to prevent hyperextension. When the foot strikes the ground, the hamstrings are activated, and they help to generate force as the foot pushes off the ground. This is especially important when sprinting or running uphill, as the hamstrings have heavier resistance during these activities.
To run faster and more efficiently, strong hamstrings are necessary. Strength training and regular stretching are important to build strength and flexibility in the hamstrings, which will also help to prevent potential injuries. Bulgarian split squats, good mornings, and deadlifts are exercises that can help target the hamstrings.
Running uphill or downhill requires a different form, as the muscles are worked differently. Running downhill is easier on the cardiac muscles, but the hip, leg, and ankle muscles work harder, especially the hip extensors, quads, and knees. Running uphill requires more leg muscle activation to overcome gravity, and the vastus muscles of the quadriceps are engaged more, while the hamstrings are used less. Uphill running also changes the impact on the foot strike, putting more pressure on the calves and ankles.
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Calf muscles
Running is a great way to tone your calf muscles. The calf muscles are located on the back of your lower leg and are responsible for reducing the shock of impact as you land, helping with balance, and ankle mobility.
When you run, you use your calf muscles to push off and raise your leg to propel yourself forward. Running also works your tendons and ligaments, which help to absorb some of the impact. This helps to make your body more stable and prevents too much movement between bones.
To tone your calf muscles, you can try classic calf raises, which use your body weight to strengthen and tone the gastrocnemius and soleus muscles. You can do these anywhere and they don't take a lot of time. Simply stand with your feet hip-width apart, and make sure your ankles, knees, and hips are aligned to protect your joints. Then, press down into the balls of both feet to raise your body upward.
You can also try dynamic plyometric movements or any kind of sport or dance class that involves running, jumping, and pushing off your calf muscles. Swimming is another great option, as it works your calf muscles without putting too much stress on your joints.
Remember, to build strength and see results, you need to be consistent with your exercises. Aim for two to three times a week and stay hydrated to keep your muscles functioning optimally.
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Frequently asked questions
The muscles that do most of the work when running are the quadriceps, gastrocnemius, and hip flexors. The quadriceps are a group of four muscles in the front of the thigh that help bend the hip and straighten the knee. The gastrocnemius muscles are on the upper back of the calf. The hip flexors are a group of three muscles in the front of the hip that help move the knee toward or away from the chest.
Running is a whole-body workout, but the core and lower body muscles are primarily used. The abdominal muscles, hamstrings, calves, inner thighs, abs, shoulders, and glutes are also used when running.
Running on hills or inclines requires more engagement from the gluteus maximus (glute max) and quads. Downhill running is more demanding on the quads as they have to perform strong eccentric contractions to control speed.
