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Cardio is often thought to hinder muscle growth, with many believing that it switches the body to a catabolic state, eating away at hard-earned muscle. However, this is a misconception, as cardio does not burn muscle tissue. In fact, when combined with resistance training, aerobic exercise is more effective at reducing body fat percentages than strength training alone. Nevertheless, excessive cardio can decrease muscle growth potential, with cortisol released during over-exercise suppressing the immune system and making it harder to sleep. Therefore, it is important to find the right balance of cardio and strength training to achieve bodybuilding goals.
| Characteristics | Values |
|---|---|
| Does cardio burn muscle? | No, cardio does not burn muscle tissue. |
| Recommended cardio sessions | 2-3 sessions per week, 20-30 minutes per session |
| Type of cardio | Low-impact cardio such as cycling, rowing, or incline walking is recommended. |
| Timing of cardio | Cardio should be done after lifting weights, or at least 6 hours before lifting weights. |
| Nutrition | Adequate nutrition, including protein, is important to prevent muscle loss when doing cardio. |
| Benefits of cardio | Cardio can increase muscle size, improve insulin sensitivity, and optimise pathways for muscle repair. |
| Cardio and muscle growth | Excessive cardio can decrease muscle growth and interfere with strength training goals. |
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What You'll Learn
- Doing cardio before weightlifting can decrease performance
- Excess cardio can negatively impact sleep and weaken the immune system
- Cardio can burn muscle if not combined with weight training
- Cardio can burn muscle if not supplemented with a nutritious diet
- Low-impact cardio is better for muscle growth than high-impact cardio
Doing cardio before weightlifting can decrease performance
Cardio and weightlifting are both important components of a well-rounded fitness routine. However, performing cardio before weightlifting can decrease performance in the latter. This is because the primary fuel source for weightlifting is stored sugar in the muscles, called glycogen. Doing cardio first depletes some of this glycogen, reducing energy levels and making weightlifting more challenging.
A 2016 study found that participants who performed a 20-minute cardio session prior to lifting weights experienced a significant decrease in their workout performance. Similarly, a study published in the Journal of Strength and Conditioning Research (JSCR) found that running or cycling before strength training limited the number of weight-lifting reps participants could perform compared to strength training alone.
The order in which you perform cardio and weightlifting depends on your fitness goals. If your primary goal is to improve endurance, doing cardio before weightlifting may be the better approach. However, if your goal is to build muscle strength, it is recommended to prioritise weightlifting and perform cardio afterward.
It is worth noting that the combination of cardio and weightlifting in the same workout can make your routine more efficient, especially if you have a limited amount of time to train. Additionally, a proper diet and lifting program can help mitigate the negative effects of cardio on muscle growth.
In conclusion, while cardio before weightlifting can decrease performance, it is not necessarily harmful to muscle growth if complemented with an appropriate diet and training program.
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Excess cardio can negatively impact sleep and weaken the immune system
Cardio training is an important aspect of fitness and bodybuilding. However, excessive cardio can have negative impacts on sleep and the immune system. Firstly, it is important to note that the science is clear that cardio alone does not burn muscle tissue. Aerobic exercise in moderation does not eat muscle or reduce strength levels. In fact, it can improve strength and contribute to muscle growth, especially for middle-aged and older adults. However, excessive endurance activity and long bouts of exercise can lead to a loss of lean muscle mass, particularly during caloric restriction.
Excessive cardio can negatively impact sleep quality. While moderate-intensity physical activity can improve sleep quality and reduce sleep disturbances, excessive cardio can lead to non-optimal sleep duration and degraded sleep quality. Sleep disorders, including insomnia, have been associated with cardiovascular disease (CVD) risk and adverse cardio-metabolic risk profiles. Therefore, too much cardio can indirectly impact cardiovascular health by affecting sleep.
Additionally, excessive cardio can weaken the immune system. While this is not directly caused by the cardio, the subsequent impact on sleep can contribute to immune system dysfunction. Chronic exposure to sleep disorders can compound CVD risk over time. Furthermore, excessive cardio can lead to overtraining, which may result in an increased susceptibility to infections. This is because overtraining can cause a release of cortisol, a stress hormone that suppresses the immune system.
In conclusion, while cardio is an important component of a well-rounded fitness routine, it should be performed in moderation. Excessive cardio can lead to negative outcomes, including impaired sleep quality and weakened immune system function. It is important to balance cardio with other forms of exercise, such as weight training, and ensure adequate recovery time to avoid these potential negative consequences.
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Cardio can burn muscle if not combined with weight training
Cardio, or aerobic exercise, is often believed to hinder muscle growth and is even thought to burn muscle tissue. However, this is a common misconception. The scientific research on long, steady-state cardio training shows that it does not negatively impact muscle mass. In fact, cardio can be beneficial for muscle growth when combined with weight training and proper nutrition.
Firstly, it is important to understand that cardio can be an effective tool for burning calories and maintaining a caloric deficit, which is often associated with muscle loss. However, this does not mean that cardio directly causes muscle catabolism or the breakdown of muscle tissue. Instead, it is the result of a lack of caloric surplus needed for muscle growth. By ensuring adequate calorie and protein intake, individuals can prevent muscle loss even when incorporating cardio into their fitness routine.
Secondly, the timing and type of cardio performed in relation to weight training can impact muscle growth. Performing cardio before weight training can decrease workout performance and hinder muscle growth. It is recommended to separate cardio and weight training sessions or perform weight training first if combining them in the same workout. Additionally, focusing on low-impact cardio, such as cycling or rowing, can help minimize muscle damage and optimize recovery.
Finally, excessive cardio can lead to muscle loss. Prolonged endurance training can lower testosterone levels and increase stress hormones, negatively affecting muscle growth and recovery. Therefore, it is crucial to limit the duration and frequency of cardio workouts, typically recommended as 2-3 sessions per week, each lasting 20-45 minutes.
In conclusion, cardio can burn muscle if not combined with weight training and proper nutrition. By understanding the role of cardio in a well-rounded fitness program, individuals can maximize muscle growth and avoid common pitfalls associated with cardio training.
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Cardio can burn muscle if not supplemented with a nutritious diet
Cardio is often associated with burning muscle, but this is not always true. While cardio can help burn calories, it does not directly burn muscle tissue. However, doing excessive cardio or performing it incorrectly can slow muscle growth and interfere with muscle-building goals.
Firstly, it is important to understand that cardio can be beneficial for muscle growth when combined with a proper diet and weightlifting program. Cardio increases the number of capillaries in the muscles, improving the transportation of oxygen, nutrients, and hormones to working or recovering muscles. Additionally, cardio improves insulin sensitivity, aiding the body in processing and utilizing carbohydrates efficiently.
However, doing too much cardio or performing it at the wrong time can hinder muscle growth. For example, doing cardio before a weightlifting session can decrease workout performance and slow muscle growth. It is recommended to separate cardio and weightlifting sessions or perform cardio after lifting weights, allowing a minimum of six hours between the two types of workouts.
Additionally, the type of cardio performed can impact muscle growth. Low-impact cardio, such as cycling, rowing, or incline walking, is preferred over high-impact cardio like running, which can cause more muscle damage due to its eccentric contractions.
Furthermore, the timing and duration of cardio workouts are crucial. While some recommend keeping cardio sessions under 30 to 45 minutes, others suggest a maximum of two to three 20- to 30-minute sessions per week to avoid interfering with muscle growth.
Lastly, nutrition plays a significant role in muscle growth, regardless of cardio activity. A nutritious diet that includes adequate protein intake is essential for muscle growth and repair. Therefore, supplementing cardio workouts with a proper diet can help prevent muscle loss and promote muscle recovery.
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Low-impact cardio is better for muscle growth than high-impact cardio
Cardio, or aerobic exercise, is often thought to hinder muscle growth, but this is a myth. In fact, cardio can benefit muscle growth—as long as it's done correctly. While cardio can help burn fat, it doesn't burn muscle tissue as easily as many believe. However, too much endurance activity and excessively long sessions can cause a loss of lean muscle mass, especially during caloric restriction. Therefore, it's important to be mindful of the type and amount of cardio incorporated into your training regimen.
Low-impact cardio is a great way to improve cardiovascular health without putting excessive pressure on the body. It gets your heart pumping and improves blood flow, ensuring your muscles receive the nutrients they need for growth and recovery. Examples of low-impact cardio exercises include:
- Cycling
- Walking
- Lunges
- Squats
- Planks
- Pilates
- Rowing
- Swimming
Low-impact cardio is generally safe for anyone, including those who are new to exercise or are recovering from an injury. It reduces the risk of injury and joint impact, allowing you to build muscle strength and mass without putting excessive strain on your body.
High-impact cardio, on the other hand, can be more physically demanding and cause muscle soreness, which may interfere with your ability to strength train effectively. Examples of high-impact cardio include:
- Running
- Sprinting
- Jumping
While high-intensity activities are important for muscle growth, they should be balanced with low-impact exercises to avoid overtraining and injury. For those seeking muscle growth, it's recommended to focus on weight training and keep cardio sessions to 2-3 times a week, for 20-30 minutes per session.
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Frequently asked questions
Cardio does not burn muscle tissue. However, excessive cardio can decrease your potential for muscle growth.
Cardio sessions of more than 20-30 minutes, three times a week are not recommended. If your goal is to build muscle, keep cardio sessions under 30-45 minutes and no more than two to three hours of total cardio per week.
It is recommended to do cardio after lifting weights, or at least six hours before your next weight session.
Low-impact cardio such as cycling, rowing, or incline walking is best for muscle growth as it saves your energy for lifting.
Cardio can help muscle growth by increasing the number of capillaries in your muscles, improving insulin sensitivity, and aiding recovery. However, it can slow muscle growth if not done correctly.
