Victor Forge
There is a common misconception that cardio burns muscle. However, scientific research suggests that cardio, when done in moderation, does not eat into muscle mass or reduce strength levels. In fact, it can improve strength and contribute to muscle growth, especially in middle-aged and older adults. Nevertheless, excessive endurance activity and long bouts of exercise can lead to muscle loss, especially when combined with caloric restriction and a lack of strength training. Therefore, it is important to strike a balance between cardio and resistance training, ensuring adequate calorie and protein intake, to maintain and build muscle mass effectively.
| Characteristics | Values |
|---|---|
| Does cardio burn muscle? | No, cardio alone does not burn muscle tissue. |
| Does cardio impede muscle growth? | No, cardio can improve strength and contribute to muscle growth. |
| What is the recommended type of cardio? | Conditioning, which focuses on improving strength training performance. |
| Does the order of cardio and strength training matter? | Yes, it is recommended to do strength training before cardio to avoid fatigue and poor form. |
| How does cardio help muscle growth? | Cardio increases blood flow to muscles, delivering oxygen and nutrients, and improves recovery. |
| What are the benefits of cardio? | Improved cardiovascular health, increased endurance, and burning calories. |
| How does nutrition impact muscle growth with cardio? | Eating enough protein and calories is essential for muscle growth and repair. |
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What You'll Learn
Cardio and weightlifting can be combined correctly
Cardio and weightlifting can be combined in a single workout session. However, the order of the exercises is important. Warming up with light cardio before a strength workout is a good idea, as it increases blood flow, excites the nervous system, and improves mental focus. However, doing a full cardio workout before weightlifting may "pre-fatigue" the muscles and negatively impact performance. Therefore, it is recommended to do a full cardio workout after the weightlifting session.
Combining cardio and weightlifting in a workout routine can help with weight loss, burning fat, and building muscle. Weightlifting can also be considered a form of cardio training if it is done in a circuit style with little to no rest between exercises, as it increases heart and breathing rates.
Additionally, doing cardio exercises can help maintain muscle mass while trying to burn fat. This is because cardio stimulates appetite, which leads to eating more throughout the day and supporting muscle mass. Furthermore, doing some strength training or resistance exercises while focusing on cardio can help maintain muscle mass.
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Calorie restriction and cardio
The CALERIE trial, a long-term calorie restriction study, found that a 25% calorie restriction diet led to a significant reduction in body weight, body mass index, waist circumference, fat mass, and percent body fat. Additionally, the trial showed improvements in cardiovascular health markers, such as blood lipids, and a reduced risk of diabetes and cardiovascular disease.
Combining calorie restriction with cardio can enhance these benefits. An 8-week study involving 45 overweight or obese adults showed that the group engaging in both alternate-day calorie restriction and exercise (aerobic and resistance training) experienced reductions in body weight, body mass index, waist circumference, fat mass, and percent body fat. These findings suggest that the combination of calorie restriction and cardio can effectively promote weight loss and improve cardiometabolic health.
However, it is important to note that excessive cardio or extreme calorie restriction can lead to muscle loss, especially when not paired with proper weightlifting and adequate calorie and protein intake. To avoid this, it is recommended to keep cardio workouts shorter than an hour, separate lifting and cardio workouts by at least 6 hours, and ensure a balanced diet with sufficient calories and protein.
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Cardio and muscle growth
However, it is important to note that excessive endurance activity and prolonged exercise can lead to a loss of lean muscle mass, especially during periods of caloric restriction. Therefore, it is recommended to monitor client outcomes to ensure that amino acids are not being used as fuel, which can hinder muscle growth.
To optimize muscle growth, it is crucial to consume a sufficient amount of protein. A minimum of 1.2 grams of protein per kilogram of body weight is recommended, and this can go up to 2 or even 2.5 grams per kilogram for collegiate or professional athletes. Carbohydrates are also essential for restoring muscle glycogen and maintaining weight, especially for endurance athletes.
Additionally, it is worth noting that the body can adapt to the type of training it receives. For example, long-distance cardio training can lead to muscle wasting, while sprinting can help build muscle mass. This is because sprinting causes small microtears and resistance training increases muscle protein synthesis, resulting in muscle hypertrophy.
In conclusion, cardio and muscle growth are not mutually exclusive. It is possible to engage in both cardiovascular exercise and muscle-building activities. However, finding the right balance and managing expectations is key. By incorporating a variety of training methods, such as strength training, endurance training, and concurrent training, individuals can achieve their desired fitness goals while maintaining overall health and wellness.
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Cardio and muscle loss
There is a common misconception that cardio exercises can cause muscle loss. However, the data and science suggest that general cardio training does not burn muscle. In fact, aerobic exercise in moderation can improve strength and contribute to muscle growth, especially in middle-aged and older adults. It can also increase the production of hormones such as growth hormone and testosterone, which are essential for muscle growth and repair. Additionally, cardio exercise can improve insulin sensitivity, which helps the body use carbohydrates more efficiently, leading to increased muscle mass.
That being said, it is important to note that excessive endurance activity and long bouts of exercise can lead to muscle loss, especially during periods of caloric restriction. This is because the body may start using amino acids as fuel, which can contribute to muscle breakdown. Therefore, it is crucial to monitor client outcomes and ensure that their exercise routines do not cross their threshold for utilizing amino acids as an energy source.
To prevent muscle loss while doing cardio, it is recommended to supplement workouts with adequate weight lifting and protein intake. This can help prevent muscle catabolism, which is the breakdown of muscle tissue for energy. Additionally, doing strength training before cardio in the same session can improve performance and prevent fatigue during strength training, reducing the risk of poor form and injury.
Overall, cardio exercises can be beneficial for muscle growth and strength improvement when done in moderation and supplemented with proper nutrition and strength training. However, excessive cardio without the necessary fuel can potentially lead to muscle loss.
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Cardio and diet
Cardio and weight training can complement each other, but only if you get the balance right. If your goal is to build muscle, you should focus on weight training and keep your cardio sessions short and infrequent. For example, you could stick to 2-3 20-30 minute sessions per week. It's also important to separate your lifting and cardio sessions by at least 6 hours, with cardio ideally coming after lifting.
If you're doing a lot of cardio and not building muscle, it's likely that your cardio activities aren't the only factor at play. Other factors include your diet, how you're training, and how much rest you're getting. For example, if you're following an extreme diet or crash diet, you may experience muscle loss, especially if you're not lifting weights.
If you want to increase the amount of cardio you're doing, you'll need to tweak your diet to ensure you're consuming enough calories and protein to build muscle. For example, you could add more carbs to your diet, such as honey, which helps regulate blood sugar during intense exercise.
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Frequently asked questions
Cardio does not burn muscle tissue. However, too much endurance activity and very long bouts of exercise can cause a loss of lean muscle mass, especially if you are not consuming enough calories and protein.
Research suggests that keeping your cardio workouts under an hour will not burn muscle. However, if your goal is to build muscle, you may want to stick to 2-3 20-30 minute sessions per week.
Yes, some types of cardio are better for maintaining strength. For example, cycling is a low-impact workout that does less damage to the muscles than running.
It is recommended to do cardio after lifting weights, ideally after a minimum gap of 6 hours. This is because a 2016 study showed that participants who performed cardio before lifting weights experienced a decrease in their performance.
While cardio alone does not build muscle, it can help in muscle growth by improving insulin sensitivity, which helps the body use amino acids and carbohydrates more efficiently.
