When does your body burn muscle instead of fat

If you’ve been working hard to get in shape yet still want to lose fat, you may have concerns that you’ll lose muscle as well. To prevent this, you can follow a few eating and fitness guidelines that will help you achieve the results you want.

You must go about losing weight safely and effectively to optimize fat loss and muscle maintenance. This is especially important if you want to maintain your fitness level, physical activity, and overall function.

With the right approach, it’s possible to lose fat while maintaining muscle mass. This article outlines how you can use an exercise and eating plan to effectively shed fat without losing muscle.

To lose fat, you need to consume fewer calories than you burn each day and exercise regularly. Frequent physical activity helps get rid of fat. If you lose weight without exercise, you’re more likely to lose both muscle and fat.

While it’s not possible to lose fat on particular areas of your body, you can work on lowering your overall body fat percentage.

Go slowly. Losing weight quickly may contribute to muscle loss. It’s best to lose a small amount of weight each week over a longer period.

To keep the muscle you have while losing fat, you’ll need to strike a balance between limiting yourself and pushing yourself as much as you can.

Each person will have different results. Listen to your body, and adjust your workout and eating plan accordingly.

Schedule recovery time

Give yourself enough time to recover between workouts. This is especially important if you’re eating fewer calories and doing intense workouts. Get plenty of sleep, which helps restore your energy levels.

Don’t restrict

Avoid any type of eating plan that’s too drastic or restrictive. It will be harder to keep up with long term.

Avoid overtraining, and stay away from any workout plan that has the potential to drain you or cause injury. Pushing yourself too hard or fast may result in missing workouts due to fatigue or injury. Remember, rest days are important.

Exercise

Exercise is another important aspect of maintaining muscle mass. Research from 2018 examined the effect of calorie restriction combined with resistance, endurance, or both types of training in older adults with obesity.

The researchers found that when individuals followed an eating plan and did some type of exercise, they were able to prevent muscle loss due to calorie restriction.

Most of the eating plans consisted of 55 percent carbohydrates, 15 percent protein, and 30 percent fat.

More research is needed to determine which type of exercise is most effective in preventing muscle loss.

Eat healthy

Change up your eating plan to include healthy proteins and fewer unhealthy fat sources.

In a 2016 review of 20 studies, researchers found older adults retained more lean mass and lost more fat when consuming higher protein diets.

Try a supplement

Consider taking a supplement, such as chromium picolinate, which is said to have a positive effect on weight loss, hunger, and blood sugar levels.

Research from 2018 points to the importance of reducing body weight without losing lean body mass.

Along with taking chromium picolinate, you can do this by:

  • eating the right amounts of macronutrients, such as proteins, fats, and carbohydrates
  • managing calorie intake
  • doing resistance exercise

Before taking any supplement, it’s a good idea to check in with your doctor. Some supplements may negatively interact with certain medications or conditions.

Follow a few of these tips to help you exercise smarter to hit your goals.

Do cardio

To lose fat and gain or maintain muscle mass, do moderate- to high-intensity cardio for at least 150 minutes per week. Example of cardio exercises include:

  • cycling
  • running
  • boxing
  • soccer
  • basketball
  • volleyball

Increase intensity

Increase the intensity of your workouts to challenge yourself and burn calories. For your workout to effectively build strength, you must push your muscles to their maximum capacity. This may involve taking a break before proceeding.

Continue to strength train

Do strength training two to three times per week. This may be a combination of:

  • weightlifting
  • bodyweight exercises
  • resistance band exercises

Exercise classes, such as yoga, Pilates, or tai chi, are also options.

Always start with low weight loads and fewer repetitions. Gradually work your way up to heavier weights or more repetitions. This will help avoid injury.

Strength training helps prevent muscle loss while increasing muscle mass. Make sure your routine is balanced and targets all the main muscle groups.

Give your muscle groups time to recover. You can aim to target each muscle group a maximum of twice per week. To cut fat, you can also incorporate interval training into your workout plan.

Take a rest

Allow for adequate rest and recovery on alternate days. Either take an entire day off, or opt for light-intensity exercise, such as walking, swimming, or dancing.

To optimize fat loss while maintaining muscle mass, follow a healthy diet that meets your nutritional and energetic needs.

Eating healthy foods may also help you feel full, so you’ll be less likely to overeat.

Before your workout, make sure you’re well hydrated by drinking plenty of fluids. Replace sugary beverages with drinks such as green tea, coconut water, and fresh vegetable juice. You can also have a light, easy-to-digest meal that’s rich in carbohydrates.

Within 45 minutes of finishing a workout, eat a meal containing protein, carbohydrates, and healthy fats.

Boost your energy levels with carbohydrates after a workout. This helps in the recovery process, and may even help speed up that process. Carbohydrates help replace glycogen stores that were used for energy during exercise.

Carbohydrates that are ideal to eat after exercise include:

  • fresh fruit
  • sweet potatoes
  • whole wheat pasta
  • dark, leafy vegetables
  • milk
  • oatmeal
  • legumes
  • grains

Protein options for gaining lean muscle include:

  • lean meats, such as turkey and chicken
  • seafood
  • nuts
  • eggs
  • low fat dairy products
  • beans
  • quinoa
  • buckwheat
  • brown rice
  • protein shakes

You can also include healthy fats in your postworkout meals, including:

  • avocado
  • nuts
  • nut butters
  • chia seeds
  • trail mix
  • dark chocolate
  • whole eggs
  • olive and avocado oil
  • fatty fish
  • cheese

A certified nutritionist or dietitian can help you align your eating and exercise plan with your overall goals.

Working with a professional may be especially beneficial if your eating plan affects any existing health conditions, or if you have special dietary needs. It’s also useful for people who are unsure of exactly how to change their eating habits.

A personal trainer can help you create an exercise routine that’s in line with your goals and fitness level. They’ll also make sure you’re using the correct weights and using proper form.

As you progress, a pro can continue to tailor your program in a way that helps you advance. They’ll also motivate you and provide accountability.

If working with a professional isn’t possible, consider finding a buddy with whom you can create an eating and fitness plan. Together you can help each other succeed.

While you may end up losing a small amount of muscle mass along with excess fat, you can help manage it with a proper eating and exercise plan.

To support fat loss, maintain a calorie deficit while eating lots of protein, carbs, and fresh fruits and vegetables.

Set attainable, realistic goals. Keep track of your progress over several months. Challenge yourself to improve your performance and focus on building strength.

Stay consistent in your approach, and continue to focus on your progress. Be sure to appreciate the benefits of your hard work.

TIMESOFINDIA.COM | Last updated on - Sep 1, 2020, 15:36 IST

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To avoid losing muscle along with fat, you have to combine exercise programming with the right strategy for fueling.

As a trainer, you probably already know this, but do your clients? Your recommendations and strategies for fueling have to match the goals of your clients. Typically a client’s goal is to lose weight and look better, not to lift a certain amount of weight or be a better endurance athlete.

When you work out to lose weight, without knowing how to do it the right way, you end up creating a smaller version of your unmuscular self. You need to know how to explain to your clients about combining exercise and food to maximize fat loss and minimize muscle loss for optimal body condition. In this article, we'll break it down in a way that is fairly simple for your clients to understand, so feel free to share!

You don’t need a Ph.D. in biology to make sound recommendations to your clients, but you do need a solid knowledge of the basic principles of fueling and working out:  

Basic Principle #1: The body is a biogenetic continuum of energy systems.

Adenosine triphosphate (ATP) is our fundamental unit of energy. The body uses ATP to fuel work. The human body has enough ATP to fuel 5 to 10 seconds of work before it starts to break down stored macronutrients to manufacture more ATP.

The easiest macronutrient to burn is sugar. Exercise lasting from 10 seconds to several minutes uses predominantly glucose in the form of pyruvate, and if the exercise is intense enough, in the form of lactate.

After several minutes of work, the body will begin to burn fats for energy use.

Share This: The body will burn sugars first, always.  

Basic Principle #2: Exercise intensity determines how you fuel your body.

High-intensity workouts such as weight lifting, cross-fit, Tabata, high-intensity interval training (HIIT), and sprinting, cause physiological responses that are different from those caused by aerobic training.  

High-intensity work is anaerobic, meaning without oxygen. High-intensity work has a lot of unique effects on the body:

  • It creates an Excess post-exercise oxygen consumption (EPOC) effect—the body burns calories resynthesizing ATP.

  • The body burns calories restoring oxygen to myoglobin and the blood.

  • The body experiences an elevated core temperature and heart rate, increased respiratory rate, and thermogenic effects of fat burning hormones such as epinephrine. 

    [5]

Lower intensity and endurance workouts are aerobic activities. The primary effect they have on the body is to burn fat as fuel, once you have gotten through the available sugar.

Share This: You burn fat during low intensity, aerobic workouts, but the benefit from high-intensity exercise occurs predominantly after the workout.

For more information on the role fats play, check out the ISSA's article on Explaining Fats' Function to Clients.

Fueling for the Workout: High-Intensity Days

With these things in mind, the goal of fueling should be to optimize the workout. For example, low-carbohydrate diets can be an effective strategy for weight loss. But on days of high-intensity workouts, low-carbohydrate fueling may not be the most effective strategy, especially post workout.  

The body burns sugars first. Low glycogen levels (stored carbohydrates) combined with high-intensity exercise creates opportunities for the body to burn higher amounts of muscle—not what anyone wants.

As well-known Canadian bodybuilder and strength coach Christian Thibodaux once said, those who burn up both fat and muscle create “smaller versions of their unaesthetic selves,” and this is not the goal of improving body composition. 7

Therefore, on higher intensity days the optimal situation is to create opportunities to consume protein to rebuild muscle and carbohydrates to burn as fuel.

Insulin is a power hormone that stimulates protein synthesis and it also releases blood sugar for energy use. Insulin is triggered when you eat carbohydrates.5 So, you want to eat carbs on these high-intensity days to ensure you have enough sugar to burn. This prevents the body from breaking down muscle to burn protein for energy. 

Share This: Complex carbs should be consumed well before a workout and especially after. The body needs the insulin for protein synthesis after the workout is complete.

Also, review popular protein myths with your clients so they know how much protein they need and how it will affect their bodies.

Fueling for the Workout: Low-Intensity Days

On days that you do a lower intensity, aerobic workout, fueling will be different. On these days the goal is to burn fat, so everything put into the body should be to induce lipolysis—the burning of fat for energy.

In other words, these are your low-fat days. Total fat intake should not exceed 20% of total calories and the same goes for carbohydrates. There are two enemies of lipolysis and fat burning:

  • Insulin Remember that the body’s natural response is to burn sugar first. It may be helpful to think of fat and sugar use for energy as two separate faucets: when sugar is available, the body will turn down the volume of fat burn on one faucet and increase the sugar burn of the other faucet. This is related to insulin. When the pancreas releases insulin, lipolysis is inhibited [4].

Share This: On longer, slower aerobic days, foods that trigger insulin release, namely simple carbohydrates, should be avoided completely.

  • Lactate - According to research, another inhibitor of lipolysis and fat burn is lactate. 4

      Lactate is present in muscles for energy use at rest and during high-intensity exercise. Lactate is either used by slow twitch muscles for energy or it gets recycled to the liver for glycogen storage. [4] The body prefers to reserve it for energy use.  So, the more lactate has accumulated in the body, the less fat will be burned during aerobic exercise. High-intensity exercise causes large increases in lactate production and therefore should be avoided on low-intensity days designed to burn fat.The lower the exercise intensity, the higher the percentage of fat that is burned. [5] Sure, higher aerobic intensity will cause fat to be burned but also will cause higher amounts of muscle to be burned.

Share This: Aim to maintain a heart rate between 105 and 125 during exercise on low-intensity days.  

Alternate High- and Low-Intensity Days and Fuel Accordingly

The major takeaway—and the basic information you want to relay to your clients—is that to lose weight while gaining, or at least not losing, muscle, you need to alternate your workouts between high-intensity, anaerobic exercises, and low-intensity aerobic work. And then fuel accordingly on those days:

  • On high-intensity days, acquire or preserve muscle by eating more and including carbohydrates.

  • On low-intensity days, burn fat without losing muscle by truly keeping the workout intensity low and by avoiding carbohydrates, especially simple carbs.

Burning fat and maintaining muscle is both difficult and time-consuming. No quick fix exists. Encourage your clients to use the slow and steady, proven approach and to avoid fad cleanses and other diets based on drastic caloric restrictions.

These types of fueling strategies combined with exercise rich programming can cause immediate drops in clothing size and win on the scale, but over the long-term, they do more harm than good. Always focus on the long, slow, disciplined, and healthy approach to exercise and fueling.

Intrigued by the relationship between food and fitness? Boost your knowledge and build a money-making career with the ISSA'S Nutritionist course. Learn how to help clients amplify their progress with optimal nutrition and hit their fitness goals faster!

REFERENCES

1. Brooks, G. (2000). Intra- and extra-cellular lactate shuttles.  Medicine & Science in Sport & Exercise, 32(4), 790 – 799.
2. Donovan, C, & Pagliassotti, M. (1998). Quantitative assessment of pathways for lactate disposal in skeletal muscle fiber types.  Medicine & Science in Sports & Exercise.
3. Gladden, B. (1998).  Muscle as a consumer lactate.  Medicine & Science in Sports & Exercise.  
4. Gualano, A., Bozza, T., Lopes, D., Roschel, H., Costa, D., Marquezi, L., Benatti, F., & Herbert, J. (2011). Branched-chain amino acids supplementation enhances exercise capacity and lipid oxidation during exercise after muscle glycogen depletion.  Journal of Sports Medicine Physical Fitness, 51(1), 82 – 88.
5. Jeukendrup, A., Saris, W., & Wagenmakers, J. (1998).  Fat metabolism during exercise: A review part 1: Fatty acid mobilization and muscle metabolism. International Journal of Sports Medicine, 19, 231 - 244.6. McArdle, W., Katch, F., & Katch, V. (2010). Exercise physiology. Seventh Edition.  Lippincott Williams and Wilkins: Philadelphia, PA.

7. Thibaudeau, C. (2016). Fasted cardio eats muscle. Plus 6 other fat loss mistakes. T-Nation.
8. Verkhoshansky, Y., & Siff, M. (2009). Supertraining. Sixth Edition.  Verkhoshansky: Rome.

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