Ok i heard if you get your heart rate going really high, it burns both fat and muscle. Is this true? I heard it usually only happens on the treadmill, but can it actully happen in weight training? It pisses me off if you get your heart rate going 80% it burns muscle, lol i like running fast and it bumps up there kind of fast.
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Is this a myth?
- Thread starter samaldaas
- Start date
first you ask if it's a myth or not, then when I say it is, you say no? Why ask if you have already made up your mind? what do you think your heartrate would be after 20 rep squats? (done with your 10 rm, the last 10 reps consists more or less of singles) now ask your trainer if the 20 rep squat program builds or burns muscle.
Ok i heard if you get your heart rate going really high, it burns both fat and muscle. Is this true?
Not true.
I heard it usually only happens on the treadmill,
Not true.
but can it actully happen in weight training?
It's very unlikely you would burn much - if any - muscle as fuel during weight training
Weight training is primarily an anaerobic exercise and as such, it uses mostly sugars - and to a lessor extent - fat as the primary fuels for training.
It pisses me off if you get your heart rate going 80% it burns muscle,
Not true - it doesn't.
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Well sorry for saying you are wronge, but this guy is a qualified trainer. I think he knows what he is talking about :S...i think
then why question him in the first place? You seem to believe anything anyone who's a qualified trainer says.. do you know what it takes to become a qualified trainer? Not a lot.
I am with Wrangll and Karky on this one.
A high heart rate does not burn muscle. Look at most athletics, football, track and field. During training and competition the heart rate gets very high. Yet these athletes are still able to build muscle.
Weight training can increase the heart rate very high as well.
There is nothing, no research, no anything, that correlates a high heart rate with muscle loss.
Below are listed the only things (aside from disease, illness, or anything along those lines) that can lead to a decrease in muscle.
1. Not eating enough.
2. Long distance cardiovascular activity, done over a long period of time. (months, years) and generally, even then, only in people who have done weight training to increase muscular size first.
3. Not weight training, since muscle mass decreases as we age.
That's pretty much it.
A high heart rate does not burn muscle. Look at most athletics, football, track and field. During training and competition the heart rate gets very high. Yet these athletes are still able to build muscle.
Weight training can increase the heart rate very high as well.
There is nothing, no research, no anything, that correlates a high heart rate with muscle loss.
Below are listed the only things (aside from disease, illness, or anything along those lines) that can lead to a decrease in muscle.
1. Not eating enough.
2. Long distance cardiovascular activity, done over a long period of time. (months, years) and generally, even then, only in people who have done weight training to increase muscular size first.
3. Not weight training, since muscle mass decreases as we age.
That's pretty much it.
the lower it bumps per minute, the better!Ok i heard if you get your heart rate going really high, it burns both fat and muscle. Is this true? I heard it usually only happens on the treadmill, but can it actully happen in weight training? It pisses me off if you get your heart rate going 80% it burns muscle, lol i like running fast and it bumps up there kind of fast.
Ok i heard if you get your heart rate going really high, it burns both fat and muscle. Is this true? I heard it usually only happens on the treadmill, but can it actully happen in weight training? It pisses me off if you get your heart rate going 80% it burns muscle, lol i like running fast and it bumps up there kind of fast.
It's not a myth. Once you breach around 80-85% of your heart rate max, your body becomes unable to generate enough energy through fat metabolism. It then has to rely more heavily on the already occurring carbohydrate metabolism to supplement its energy deficit. The key here is that with prolonged exercise your body is not able to supplement its energy requirements with carbohydrate metabolism alone because 1) it doesn't produce a whole lot of energy in the first place, and 2) carbohydrate metabolism slows due to depleted sugar levels within the cells, at which point...
the body turns to protein metabolism for energy. And where is the nearest supply of protein? In the muscular tissue already doing the work.
This actually happens a lot in marathon running, but can happen during any form of exercise in the spectrum if the intensity level is high enough for a prolonged period of time.
Understandably, your body is not generally relying on fats for energy during resistance training, but if you are working out at such an intensity that you are maintaining a heart rate around 80-85% of your max then it means that your body is working extremely hard to both deliver fuels (fats/carbs/proteins) to the cells to generate energy and removing metabolic wastes from your cells to prevent stalling of the metabolic process within the cells. That high a heart rate means that you body is working in an energy deficit, meaning that if it is prolonged, it will have to eventually turn to proteins to supplement its energy needs.
the lower it bumps per minute at rest, the better (unless it's abnormally low, offcource). Not necessarily during exercise..
No, the lower your heart rate during any activity, the better. That is why a sedentary individual's heart will beat 90-110 beats per minute at rest, but a highly trained runner's heart will beat the same number of times during a moderate workout.
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Sounds super hard!
It's not a myth. Once you breach around 80-85% of your heart rate max, your body becomes unable to generate enough energy through fat metabolism. It then has to rely more heavily on the already occurring carbohydrate metabolism to supplement its energy deficit. The key here is that with prolonged exercise your body is not able to supplement its energy requirements with carbohydrate metabolism alone because 1) it doesn't produce a whole lot of energy in the first place, and 2) carbohydrate metabolism slows due to depleted sugar levels within the cells, at which point...
the body turns to protein metabolism for energy. And where is the nearest supply of protein? In the muscular tissue already doing the work.
This actually happens a lot in marathon running, but can happen during any form of exercise in the spectrum if the intensity level is high enough for a prolonged period of time.
Understandably, your body is not generally relying on fats for energy during resistance training, but if you are working out at such an intensity that you are maintaining a heart rate around 80-85% of your max then it means that your body is working extremely hard to both deliver fuels (fats/carbs/proteins) to the cells to generate energy and removing metabolic wastes from your cells to prevent stalling of the metabolic process within the cells. That high a heart rate means that you body is working in an energy deficit, meaning that if it is prolonged, it will have to eventually turn to proteins to supplement its energy needs.
So you're saying the body can convert protein to energy faster than it can convert carbs and fat? I think you have missunderstood; The "problem" with high intensity exercise is that your body won't be able to deliver oxygen fast enough to the cells, then our body has to start converting glucoses/whatever else to ATP (which is energy) without oxygen, this is a process which is not efficient (you get 2 ATP per glucose molecule compared to 36 if you're using oxygen. Anaerobic and aerobic metabolism respectively) and also leaves lactate acid in your muscles.
There's not a magical limit where you stat burning protein. But you're body will have used most of it's glocoses and glycogen in the muscles before it starts tearing from your muscles and fat (although though fat is kinda burned along side everything here)
EDIT:
wait a minute.. you first say it's not a myth that at 85% your body starts burning protein. Then you say that it's due to prolonged exercise... What exactly is your stand on this?
I'm not implying that the body can convert proteins more quickly. However, your body utilizes proteins even before you reach 85% of your max heart rate. No metabolic process is completely perfect, and proteins are used in very small amounts once anaerobic glycolysis begins. Generally, once your heart starts beating at rates around 80-85% of your heart rate max, it means that your body is beginning to strain itself in order to deliver fuels to muscle cells.
If your body maintains this pace for a prolonged amount of time, it cannot deliver the requisite amount of fats and carbohydrates to continue fueling such a high level of activity, and then utilizes a more readily available source of energy. I'm not say that all carbs/fats are now vacant at the cellular level, but the body begins increasingly using proteins because they are more readily available.
In the relatively short amount of time (6-10 minutes) it takes for an individual to complete a VO2 max test, it is common for a person to break the respiratory exchange ratio threshold for utilizing fats/carbs around 80-85% of their heart rate max at which point an individuals body begins to rely more heavily on proteins as fuels because the body cannot convert fat to energy quickly enough, the glycogen supplies at the cellular level have decreased, and because lactate build-up begins to slow carbohydrate glycolysis.
If your body maintains this pace for a prolonged amount of time, it cannot deliver the requisite amount of fats and carbohydrates to continue fueling such a high level of activity, and then utilizes a more readily available source of energy. I'm not say that all carbs/fats are now vacant at the cellular level, but the body begins increasingly using proteins because they are more readily available.
In the relatively short amount of time (6-10 minutes) it takes for an individual to complete a VO2 max test, it is common for a person to break the respiratory exchange ratio threshold for utilizing fats/carbs around 80-85% of their heart rate max at which point an individuals body begins to rely more heavily on proteins as fuels because the body cannot convert fat to energy quickly enough, the glycogen supplies at the cellular level have decreased, and because lactate build-up begins to slow carbohydrate glycolysis.