Carbs and fat loss

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bpm1978's picture

bpm1978

Question:

Carbs and fat loss

I have some bodyfat that I would like to lose and have begun to run a hour a day. If I cut out most of the carb and fat calories for a few weeks, and eat nothing but tuna and protein powder will the body burn the bodyfat or will it go after muscle as well?

jasmin garden's picture

jasmin garden

1. keep your runs shorter but intense. i,e 2* 1/2 hr
2. longer runs would eatup muscle.

for intense workout u would need some good carbs to fuel those workouts.

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NAVEENCHOWDARY's picture

NAVEENCHOWDARY

its incorrect to take a decetion like for loosing fat stop eating fats/carbohydrates.
because,when u stop taking these your body depends on protein. by this you becom mallnurtiesus,and have aminoacid deffecaincy and by this you will wb fasing extra problems.
have evrything and plan to utelise extra callories than you take by exercises this will be best way and only way in which you never return your lost weight.

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swimref's picture

swimref

Carbohydrates are used in the process of making glycogen, which in turn is used to build atp stores and replenish it as you exercise. Fats are also used in all tissues except for the brain in the production of ATP during exercise. One big difference is that the conversion of fatty acids only occurs in the presence of oxygen. So to burn fat, you need to be doing something in your aerobic range. Slow twitch muscle fiber use fatty acid oxidation as a major source of energy during prolonged use. So, to burn fat you need to do prolonged aerobic exercise, not stop eating carbohydrates. The relationship between eating and weight loss is making sure you burn more calories than you take in, but eat a balanced diet for the calories you do take in. As far as maximizing fat loss goes, the higher you get in your aerobic range and the longer you sustain it, the more fat you will burn. The time you start loosing muscle is when you deplete the other nutrients needed to metabolize the fat.
If you are really worried about it, do some weight training as well. Besides, added muscle will cause you to burn more calories anyway.

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bpm1978's picture

bpm1978

thanks jasmin garden

Actually that is exactly what I do. I run for about 1/2 hour twice a day at about 80% of my maximum heart rate.

I am not overweight (5'9" and 170 lbs). It's just that I have a stubborn 19% body fat content (based on one of those Tanita scales, which I know is not perfectly accurate) that I'd like to get down to 16%-17%.

I am following a low fat diet right now and I beginning to replacing carbs with protein in my diet (which naturally makes me feel a little sluggish). I do lift some weights. What I want to figure out if I follow this for a couple of weeks I can get my body to burn bodyfat (and extra protein) for fuel without cannibalizing any muscle tissue.

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jusrockinout's picture

jusrockinout

...try not to get too technical with it.Your body needs carbs.Continue running, but get your self at least a day or two of rest, esp. if you are increaasing intensity. Eating nothing but tuna and protein powder is not the healthiest. Eat plenty of FRESH fruit and veggies, drink only water(this alone can cut several hundred calories for some) do not stave yourself. Eat stuff you enjoy, but be humble.

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alexchan338's picture

alexchan338

you need a normal balanced diet, according to sports nutritionist - you need a diet that cannot be too low in fat content and too high in fat content.

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grumpy59's picture

grumpy59

Hiya,
Interval training, a proper balance to diet (Carbs/Prot/Fat) and a variety of workouts (incorporate strength training, cross-training, etc into your plan).

I have heard a lot about the amount of time doing CV before you start eating muscle...some say 30 mins, some 45 some even an hour. I don't know myself but try to do 45 mins- 1 hour max unless training for a 1/2m or longer. Would be interested to hear if that time limit can be lengthened by taking in more carbs during the run...?

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Alina's picture

Alina

Yes, Exercise and walking is good and useful for losing fat. But After the intense workout you should take low carb diet to burn your fat which naturally makes you feel a little sluggish. The low carb diet is also good for blood pressure control and reduces blood glucose for diabetes.

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