Dominic Stone
Running is a popular form of exercise that can improve your health in several ways, including building muscle. However, it is also a physically demanding activity that can lead to injuries and muscle tears. The relationship between running and muscle growth or loss depends on various factors, such as the type of running, the duration and intensity of workouts, and individual characteristics. So, does running tear down muscle? Let's explore this complex question and understand the impact of running on muscle health.
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What You'll Learn
High-intensity running can build muscle
High-intensity, short-duration running workouts like High-Intensity Interval Training (HIIT) can help build lower body muscle, particularly in the quadriceps and hamstrings. HIIT involves short bursts of running at a high intensity, followed by a period of active recovery. For example, a workout may consist of 45-second sprints at moderate intensity, followed by a few minutes of walking or light jogging. Hill sprints are another effective variation, where the runner sprints uphill for a short duration and then walks back down to recover.
The muscle-building effects of high-intensity running are supported by studies. One study found that recreationally trained college students who performed 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. Another study by the US Army Research Institute found that steady-state cardio, such as running and cycling, can increase growth hormone levels, which are essential for muscle growth.
However, it is important to note that long-distance running may have the opposite effect and inhibit muscle growth. This is because long-distance running can significantly increase muscle protein breakdown (MPB) and cause muscle damage, which hinders muscle growth. Additionally, the stereotype of a long-distance runner is often someone who is very lean, with little muscle mass.
To maximize muscle growth through high-intensity running, it is crucial to combine workouts with proper nutrition, especially protein intake. Protein enhances muscle protein synthesis (MPS) and promotes greater muscle gains. Experts recommend consuming 0.64–0.91 grams of protein per pound of body weight daily for optimal muscle growth.
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Long-distance running may break down muscle
Running is a popular form of exercise that can improve your health in numerous ways. It can enhance your aerobic capacity, increase muscle mass, promote good cholesterol, and decrease body fat. However, the impact of running on muscle mass is complex and depends on various factors, including the type of running, the duration and intensity of the runs, and individual characteristics.
Long-distance running, especially when performed downhill, has been associated with muscle damage and reduced muscle strength. This effect is more pronounced when running downhill due to the high number of eccentric contractions required, particularly for the knee extensors. Studies have shown that muscle damage induced by long-distance running can negatively impact endurance running performance, with strength and force production decreasing in the days following the run.
The type of running and the duration and intensity of the runs play a crucial role in muscle building or breakdown. High-intensity, short-duration running, such as sprinting or HIIT workouts, is more likely to build muscle. This is because muscle building occurs when muscle protein synthesis (MPS) exceeds muscle protein breakdown (MPB). High-intensity exercises provide a stronger stimulus for MPS, leading to net muscle gain. On the other hand, long-distance running may inhibit muscle building or even lead to muscle breakdown.
Additionally, individual characteristics and training history also come into play. For example, Olympic distance runners tend to have very little muscle mass due to the muscle-breaking effects of long-distance running. However, this may also be influenced by their dietary choices and overall energy balance. Proper nutrition, including adequate protein intake, is crucial for muscle building and retention. Without sufficient nutrients, the body cannot effectively support the muscle-building process, and muscle breakdown may occur.
In conclusion, while running can provide numerous health benefits, long-distance running may contribute to muscle breakdown, especially when performed downhill or without proper training and nutritional support. To maintain or increase muscle mass, it is essential to incorporate strength training, adopt a well-balanced diet rich in protein, and ensure proper recovery between running sessions.
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Running can help prevent muscle loss
Running is a popular form of exercise that can improve your health in several ways. While it is true that long-distance running can break down muscle instead of building it, running can also help prevent muscle loss.
High-intensity, short-duration running workouts like HIIT (High-Intensity Interval Training) can help build lower body muscle, especially in the quadriceps and hamstrings. HIIT workouts typically involve sprinting, which is a form of anaerobic exercise that requires carbohydrates as fuel. Carbohydrates can crank out more energy faster by burning carbs, helping meet the high demands of intense workouts.
A study involving 12 recreationally trained college students found that after 10 weeks of HIIT workouts three times per week, they showed an almost 11% increase in the muscle fiber area of their quadriceps compared to a control group. As such, workouts like sprinting may benefit muscle growth.
Additionally, running can help fight age-related loss of muscle mass. A 2018 review in the International Journal of Geriatrics and Gerontology supports this claim. Furthermore, a 2015 review published in Sports Medicine found that running increases muscle mass in people with a sedentary lifestyle.
To prevent muscle loss, it is important to have proper nutrition and training strategies. This includes strength training, adequate protein intake, and a well-balanced diet with healthy carbohydrates, proteins, and fats.
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Running downhill can cause muscle damage
Running is a popular form of exercise that can positively impact your health in several ways. It can improve your aerobic capacity, increase muscle mass, promote good cholesterol, and decrease body fat. However, it is essential to understand how different types of running can impact muscle health. While high-intensity, short-duration running, such as sprinting, can effectively build muscle, long-distance running may have the opposite effect.
Long-distance running has been associated with muscle breakdown rather than muscle building. This is especially true for ultra-marathon runners, who cover extensive distances. Downhill running, in particular, has been identified as a form of exercise that can induce muscle damage. This is because downhill running involves a high proportion of eccentric muscle actions, where the force applied to the muscle exceeds the strength produced by the muscle itself. As a result, the muscle undergoes a lengthening action, leading to mechanical strain and exercise-induced muscle damage (EIMD).
The muscle damage caused by downhill running can lead to several physiological alterations, including neuromuscular fatigue, reduced force production, and increased plasma creatine kinase (CK) activity. These alterations can persist for several days after the exercise, with peak effects recorded between immediately post-exercise and 96 hours post-exercise. The degree of muscle damage can depend on various factors, including the slope, exercise duration, and running speed.
Additionally, downhill running can cause delayed-onset muscle soreness (DOMS), which can last for several days. This soreness is a result of the higher mechanical stimulation provided to the muscles during the eccentric contractions of downhill running compared to the concentric contractions of uphill running. The knee extensors and plantar flexors are particularly susceptible to damage from downhill running, as they undergo greater negative (eccentric) work than other muscle groups.
To summarize, running downhill can cause muscle damage due to the high mechanical strain placed on the muscles during eccentric contractions. This damage can lead to reduced muscle function and performance, as well as delayed-onset muscle soreness. However, it is important to note that the impact of downhill running on muscle health may vary depending on individual factors and the specific characteristics of the running activity.
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Running and weight training can be combined
Running can help build lower-body muscles, particularly in the quadriceps and hamstrings, but this depends on the intensity and duration of the runs. High-intensity, short-duration running like sprinting or HIIT workouts can build muscle, while long-distance running may break it down instead. Running can also help fight age-related muscle loss, and it increases muscle mass for people with a sedentary lifestyle.
Weight training, on the other hand, is a form of resistance training that increases the amount of force your muscles can exert. It trains the body to work against high resistance and lift heavy weights. This results in the brain being better able to signal the muscles to contract, and the muscles may also grow in size.
Combining running and weight training can be beneficial for improving overall fitness and reducing the risk of injuries. Runners who incorporate weight training into their routines have better running form and are less prone to injuries. This is because their bodies are stronger, and the strength training improves their run form. Additionally, building muscle can help lessen the impact of running on the bones.
To effectively combine running and weight training, it is important to start with lighter weights and fewer repetitions, gradually increasing the intensity as your body adapts. This helps prevent injury and ensures consistent progress. It is also crucial to pay attention to how your body responds to the combination of the two types of training and adjust your routine accordingly. For example, if you experience fatigue, prolonged soreness, or decreased performance, it may be a sign of overtraining, and you should prioritize rest and recovery.
In addition to weight training, runners can also benefit from other forms of cross-training such as cycling, swimming, or yoga. These activities can improve overall fitness, enhance recovery, and reduce the risk of overuse injuries. As you get stronger and fitter, you can gradually increase the intensity and duration of both your runs and strength sessions, a concept known as progressive overload.
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Frequently asked questions
Running can tear down muscle if you don't take the right precautions. Running long distances can break down muscle instead of building it. However, high-intensity, short-duration running like sprinting may build muscle.
To prevent muscle tears, it's important to listen to your body and not ignore pain. Create a running plan with a trainer that suits your current fitness level and goals. Warm up and stretch before and after you run. Strength train and add weight training and ab exercises to your routine.
Common running injuries include runner's knee, stress fractures, shin splints, muscle pulls, ankle sprains, plantar fasciitis, and Achilles tendinitis.
High-intensity running like sprinting can trigger the anabolic processes needed to build muscle. Running long distances may inhibit muscle building.
Research shows that you shouldn't worry about losing significant fitness if your break from running is less than two weeks. After two weeks of not training, significant reductions in fitness begin to occur.
