
Running is an excellent aerobic workout that can help strengthen your heart muscle, improve lung function, and increase circulation throughout your body. It is a high-impact activity that can also build lower body muscles, improve bone density, and strengthen your legs, including your calves, hamstrings, quads, and glutes. While it may not build muscle mass in the same way that strength training does, running can aid muscle growth when paired with resistance training. High-intensity interval training (HIIT) and sprinting are particularly effective for muscle growth, while long-distance running may inhibit it.
| Characteristics | Values |
|---|---|
| Running builds muscles | Yes, but not as much as strength training |
| Muscle building | Occurs when muscle protein synthesis (MPS) exceeds muscle protein breakdown (MPB) |
| Running and muscle building | High-intensity, short-duration running like sprinting may build muscle |
| Running and muscle building | Running can help with muscle growth in the long term if paired with resistance training |
| Running and muscle building | Running can enhance muscle building and aid strength training |
| Running and muscle building | Running can build lower body muscles, especially in the quadriceps and hamstrings |
| Running and muscle building | Running uphill or downhill works the muscles differently |
| Running and muscle building | Running with weights can increase calorie burn, heart rate, and speed |
| Running and muscle building | Running is a high-impact activity that can tax muscles, ligaments, and tendons |
| Running and muscle building | Running strengthens the heart muscle and improves lung function |
| Running and muscle building | Running helps build strong bones |
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What You'll Learn
- Running builds lower body muscles, especially the legs, hips, and glutes
- High-intensity interval training (HIIT) helps build muscle
- Running strengthens the heart muscle and improves lung function
- Running uphill or downhill works muscles differently
- Running is not the best way to build muscle; strength training is more effective

Running builds lower body muscles, especially the legs, hips, and glutes
Running is an excellent aerobic workout that can help strengthen your heart muscle, improve lung function, and increase circulation throughout your body. But does it help build muscles in the lower body, especially the legs, hips, and glutes?
The answer is yes, running can build lower body muscles, but the extent of muscle growth depends on the intensity and duration of your runs. High-intensity, short-duration running workouts like HIIT can help build lower body muscles, particularly the quadriceps and hamstrings. In one study, participants who performed HIIT workouts three times a week for ten weeks showed an 11% increase in their quadricep muscle fiber area compared to a control group. Running uphill or downhill also engages your muscles differently and can help build strength.
The large muscles in your hips and legs do most of the work when running. Your gluteal muscles, located in your buttocks, play a vital role in propelling you forward and maintaining stability in your torso and posture. The hip flexor muscles, located at the front of your hips, also help with running form and technique. Additionally, your calf muscles, or the soleus muscle specifically, produce a significant amount of force during the push-off phase of running, aiding in reducing the shock of impact and maintaining balance.
While running can build lower body muscles, it may not lead to significant muscle mass gains as seen with strength training. However, it can help with muscle growth in the long term when paired with resistance training. Running can also enhance your muscle-building capabilities and aid in strength training routines. Therefore, incorporating running into your fitness routine can provide benefits beyond just cardiovascular improvements.
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High-intensity interval training (HIIT) helps build muscle
Running is an excellent aerobic workout that helps strengthen the heart muscle, improves lung function, and increases circulation throughout the body. However, it is a high-impact activity that can strain muscles, ligaments, and tendons. High-intensity interval training (HIIT) is a form of running or cardio workout that involves short bursts of intense activity followed by slower recovery periods. It is a challenging workout that pushes you beyond your comfort zone, helping you build muscle, burn fat, and boost metabolism.
HIIT workouts are highly effective in building lower body muscles, especially in the quadriceps and hamstrings. In a study, participants who engaged in HIIT workouts three times a week for ten weeks showed an 11% increase in the muscle fiber area of their quadriceps compared to a control group. This increase in muscle growth is attributed to muscle protein synthesis exceeding muscle protein breakdown during high-intensity exercises.
The structure of HIIT workouts, with their intense intervals and recovery periods, allows for a higher metabolism that lasts for hours after exercising. This elevated metabolism contributes to increased calorie burn, aiding in fat loss and muscle building. Additionally, HIIT's intense nature means you work harder than in typical cardio workouts, further contributing to muscle growth.
It is important to note that HIIT may not be suitable for everyone, especially those who are inactive or new to exercise. Starting with lower-impact exercises and gradually increasing intensity and duration is recommended. Proper preparation, including adequate rest periods, is crucial to preventing injuries associated with high-intensity workouts.
In summary, high-intensity interval training (HIIT) is a highly effective method to build muscle, particularly lower body muscle. Its intense intervals and recovery structure promote muscle growth, enhance metabolism, and increase calorie burn. However, it is important to approach HIIT with caution and proper preparation to minimize the risk of injuries.
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Running strengthens the heart muscle and improves lung function
Running is an excellent aerobic workout that can strengthen the heart muscle and improve lung function. When running, the heart and lungs work harder to supply the additional oxygen that the body demands. Regular exercise makes the heart and lungs stronger, and the body becomes more efficient at getting oxygen into the bloodstream and transporting it to the muscles. This improved cardio-respiratory function means that the body can perform exercise more efficiently, and the risk of becoming short of breath during exercise decreases over time.
The heart's ability to pump blood and deliver oxygen to the muscles is enhanced through regular exercise. Exercise also increases blood volume and improves the extraction of oxygen from the air in the lungs and blood at the muscles. This leads to improved lung function and reduced feelings of breathlessness during physical activity. Running also increases circulation throughout the body, which can further improve oxygen delivery to the muscles.
In addition to strengthening the heart muscle, running can also help build and strengthen other muscles in the body. For example, the calves produce a significant amount of force during the push-off phase of running, and consistent hill running can build glute, hamstring, quad, and calf strength. Faster runs, such as HIIT workouts, can also increase muscle activation and strengthen the legs. However, it is important to note that running will only build muscle to a certain point, and strength training may be more effective for significant muscle gain.
To maintain efficiency and prevent injuries while running, it is essential to have strong and flexible hip flexors, hamstrings, and calves. A strong core is also crucial for maintaining proper posture, balance, and form while running. Additionally, strong abdominals help keep the body upright and reduce the impact on the back. Overall, running can indeed strengthen the heart muscle and improve lung function, leading to numerous health benefits.
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Running uphill or downhill works muscles differently
Running is an excellent aerobic workout that helps strengthen the heart muscle, improve lung function, and increase circulation throughout the body. It is also a high-impact activity that stresses the muscles, ligaments, and tendons with each step.
Running can build lower-body muscles, but this depends on the intensity and duration of the runs. High-intensity, short-duration running like sprinting or HIIT workouts can help build muscle, while long-distance running may inhibit it. Running with weights can increase calorie burn and get your heart rate pumping, but it may not be great for resistance.
Running uphill or downhill requires a different form since the muscles are worked differently. When running downhill, your hip, leg, and ankle muscles must work harder, especially the hip extensors, quads, and knees. Running downhill may cause too much pressure on your shinbones, leading to shin splints. You naturally use more of a heel-foot strike, which helps slow down your forward movement. Be mindful not to lean your upper body too far back. Downhill running can also lead to exercise-induced muscle damage (EIMD) and alter muscle structure and function, reducing performance.
When running uphill, you must work harder and activate more leg muscles to overcome gravity. Focus on using your hip muscles to propel yourself forward and fully extend your leg behind you. Avoid leaning too far forward, as this can make it difficult to engage your hip flexors to raise your knee. Running uphill can negatively impact your balance and push-off.
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Running is not the best way to build muscle; strength training is more effective
Running is a great form of exercise that offers many health benefits, but it may not be the best way to build muscle. While it can help tone and strengthen the lower body, especially the legs, it does not lead to significant muscle growth, especially when compared to strength training.
High-intensity, short-duration running, such as sprinting or HIIT workouts, can help build lower body muscle, particularly in the quadriceps, hamstrings, and calves. These types of workouts increase muscle activation and indirectly strengthen the legs. However, the muscle-building effects of running are limited and may only be noticeable for beginners or those new to running.
To build muscle effectively, strength training or weight lifting is a more potent stimulus for muscle protein synthesis (MPS). Strength training exercises, such as lifting weights, lunges, or squats, can target specific muscle groups and promote greater muscle gains. Additionally, strength training can improve overall posture, balance, and physique, addressing potential muscle imbalances that may arise from running.
While running can enhance muscle building and aid in strength training, it is not the primary driver of muscle growth. Running is an excellent form of aerobic exercise, improving cardiovascular health, lung function, and circulation. It can also help build strong bones due to its weight-bearing nature. However, for those specifically seeking to build muscle, incorporating strength training into their routine will be more effective and complementary to their running regimen.
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Frequently asked questions
Running can help build lower body muscles, but it depends on the intensity and duration of your runs. High-intensity, short-duration runs like sprinting or HIIT workouts can help build muscle, while long-distance running may inhibit it. Running can also help improve bone density and strengthen your heart muscle.
Running works your legs, including your quads, hamstrings, calves, hip flexors, and glutes. Your inner thighs, abs, and shoulders also help, but the large muscles of your hips and legs do most of the work.
To maximise muscle growth, focus on high-intensity workouts and include hills or elevation changes in your runs. Running with weights can also increase your calorie burn and get your heart rate pumping, but it may not be ideal for resistance. Pairing running with resistance or strength training can also help with muscle growth. Additionally, proper nutrition, especially protein intake, is crucial for supporting the muscle-building process.











































