Victor Forge
The idea that cardio kills muscle gains has been a common gym myth for years. However, scientific research has found that this is not exactly true. While cardio can lead to muscle breakdown, it is important to note that it will not burn muscle unless you are doing excessive amounts of cardio, performing it before weight training, or doing high-impact cardio. The key to maintaining muscle mass while doing cardio is to ensure proper nutrition and fuel, especially consuming enough calories and protein throughout the day. Additionally, the order of your workouts matters, with weight training before cardio being the preferred sequence to maximize muscle gains.
| Characteristics | Values |
|---|---|
| Does cardio kill muscle? | No, it does not. |
| Cardio before or after strength training? | It is recommended to do strength training before cardio. |
| Cardio as a warm-up | Light cardio is recommended as a warm-up before strength training. |
| Cardio and muscle gains | Cardio can lead to muscle breakdown, but this can be counteracted by eating enough calories. |
| Caloric surplus | Building muscle requires eating more calories than your body burns. |
| Cardio and muscle loss | Excessive cardio can lead to muscle loss, especially during periods of caloric restriction. |
| Cardio and heart health | Cardio is beneficial for heart health. |
| High-intensity cardio and muscle growth | High-intensity training might impair muscle growth slightly more than low-intensity cardio training, but the effects are negligible. |
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What You'll Learn
- Cardio can lead to muscle breakdown if not balanced with a nutritious diet
- Doing cardio before strength training can hinder muscle gains
- Excessive cardio can lead to fatigue and impede muscle growth
- High-intensity cardio may impair muscle growth more than low-intensity cardio
- Cardio is beneficial for heart health and should not be avoided
Cardio can lead to muscle breakdown if not balanced with a nutritious diet
Cardio has been associated with muscle breakdown, but the science suggests that this is not necessarily the case. In fact, aerobic exercise can improve strength and contribute to muscle growth, especially for middle-aged and older adults. However, excessive cardio can lead to muscle breakdown if not balanced with a nutritious diet.
Firstly, it is important to note that the idea that cardio kills muscle gains is a common gym myth. While it may be true that cardio exercises can lead to fatigue and increased production of stress hormones, which can suppress muscle growth, recent scientific research suggests that this effect is minimal. A 2018 study review found that high-intensity interval training (HIIT) sessions have a negligible effect on muscle loss. Additionally, performing some cardio before weight training can encourage protein metabolism.
Secondly, the order in which you perform cardio and weight training is crucial. If your goal is to gain muscle, it is generally recommended to do weight training before cardio. This is because starting with heavy cardio can lead to fatigue, and you may go into your strength training session unfocused and with poor form, which could lead to injury. However, light-intensity cardio can be beneficial as a warm-up before strength work to reduce the risk of injury.
Thirdly, to prevent muscle breakdown, it is essential to have a nutritious diet that supports your training. Building muscle requires eating in a caloric surplus, which means consuming more calories than your body burns. This provides enough fuel for protein synthesis and muscle growth. Even if you are in a caloric deficit, eating enough protein and lifting weights can help you maintain your muscle mass. Additionally, ensuring proper nutrition and consuming enough calories and protein throughout the day can reduce the risk of muscle loss when training cardio and weight training concurrently.
In conclusion, while cardio can lead to muscle breakdown, this can be mitigated by balancing it with a nutritious diet and proper training regimen. The key is to have a well-rounded approach to your training programme, including both cardiovascular exercise and weight training, to support your overall health and fitness goals.
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Doing cardio before strength training can hinder muscle gains
It is a common belief in the fitness community that cardio kills muscle gains. However, this is not entirely true. While cardio can be beneficial for muscle growth, doing cardio before strength training can hinder muscle gains.
Cardio exercises, such as running, can physically demand more from your body and cause more significant muscle damage than other exercises like cycling. Additionally, doing cardio before lifting weights can fatigue your muscles, leading to poor form and an increased risk of injury during strength training. Research has shown that when cardio is done before resistance exercises in the same session, lower-body one-rep max performance is diminished compared to when resistance exercises are done first.
The order of exercises matters, especially if your goal is to gain muscle. If you start with heavy cardio, you may go into your strength training session tired and unable to lift as much or perform as many reps. Therefore, it is generally recommended to prioritize weight training first to ensure your muscles are fresh and ready for heavier lifts, which will foster muscle growth.
However, there are exceptions and different approaches depending on your fitness goals. For instance, if you are training for an endurance event like a triathlon, doing cardio first can be beneficial. Additionally, light cardio can be used as a warm-up before strength work to reduce the risk of injury. It is also possible to combine cardio and weights in the same session or on the same day without hindering muscle gains if properly spaced out and balanced.
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Excessive cardio can lead to fatigue and impede muscle growth
Cardio has long been associated with muscle loss, with some believing that it can "kill gains". However, this is a myth, and the latest scientific research suggests that cardio does not burn muscle tissue. In fact, aerobic exercise can improve strength and contribute to muscle growth, especially in middle-aged and older adults.
That being said, excessive cardio can lead to fatigue, which can impede muscle growth. This is because cardio can increase the production of stress hormones such as cortisol, which suppresses muscle growth. Additionally, it can decrease the production of muscle-building hormones such as testosterone and growth hormone. Therefore, it is important to be mindful of the amount of cardio in your workout routine.
If your goal is to build muscle, it is generally recommended to do strength training before cardio. This is because starting with heavy cardio can lead to fatigue, causing you to go into your strength training session unfocused and with less energy. This can result in poor form and increase the risk of injury. However, light cardio can be beneficial as a warm-up before strength work, reducing the risk of injury.
The amount of cardio that may lead to fatigue and impede muscle growth depends on various factors, including the intensity and duration of the workout, as well as individual factors such as age, exercise tolerance, and goals. For example, high-intensity cardio may have a slightly more negative impact on muscle growth compared to low-intensity cardio, but the effects are still negligible. Additionally, the potential for muscle loss also depends on other lifestyle and genetic factors, as well as your diet and nutrition.
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High-intensity cardio may impair muscle growth more than low-intensity cardio
There is a common belief in the fitness community that cardio workouts inhibit muscle growth. However, research shows conflicting evidence regarding the potential for endurance exercise or cardio to hinder the muscular adaptations made by resistance training.
Cardio can compromise your muscle growth and strength gains if you're not eating enough calories or getting the right nutrients. If you're in a calorie deficit, doing cardio while in a surplus will not cause you to lose body fat. It is important to note that your heart is also a muscle, and cardio is crucial for heart health.
To minimize the interference of cardio with muscle growth, it is recommended to cap the amount of moderate- to high-intensity cardio to a couple of hours a week and avoid intense cardio immediately before lifting weights. Light-intensity cardio, such as a brisk walk or moderate-intensity cycling, can be beneficial as a warm-up before strength work, reducing the risk of injury during training.
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Cardio is beneficial for heart health and should not be avoided
Cardio is often associated with muscle loss, with some believing that it can hinder muscle growth. However, this notion is largely unfounded, and cardio is, in fact, beneficial for overall health, especially heart health, and should not be avoided.
The idea that cardio inhibits muscle building stems from the concept of calories in versus calories out. Cardio exercises burn calories, which can lead to a caloric deficit, making it challenging to build muscle. Additionally, performing cardio before weight training can lead to fatigue, impacting muscle strength and size. This is because cardio exercises can increase stress hormones like cortisol, which suppress muscle growth, and decrease muscle-building hormones like testosterone.
However, scientific research suggests that cardio alone does not burn muscle tissue or reduce strength levels. While excessive cardio can lead to muscle breakdown, proper nutrition and weight training can counteract this effect. A balanced approach to training, incorporating both cardio and strength training, is key.
Cardio is particularly important for heart health. It improves blood circulation, helping to grow muscles and maintain strength over a lifetime. Research also shows that cardio exercises improve insulin sensitivity and reduce the risk of illness, contributing to overall well-being.
In conclusion, while the structure of a training programme should be tailored to individual goals and preferences, cardio should not be avoided due to its beneficial effects on heart health and overall well-being. A well-rounded approach to training, incorporating both cardio and strength training, is recommended to achieve optimal fitness and health.
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Frequently asked questions
The idea that cardio kills muscle gains is a myth. While cardio does burn calories, it does not burn muscle unless you are doing an excessive amount of cardio, not doing enough weight training, or not supplementing your workouts with a nutritious diet.
If you are an ectomorph, anything over 45 minutes of cardio can result in adverse outcomes. For other body types, aerobic exercise lasting longer than 75 minutes will start to burn muscle.
If your goal is to build muscle, you should do weight training before cardio. Doing cardio first can fatigue your muscles and hinder your performance during weight training.
Yes, cardio can help improve strength and contribute to muscle growth, especially in middle-aged and older adults. It is also good for heart health, which will help maintain strength over a lifetime.
