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Weight Loss Forum / Low Carb / May 2006How much carbs you burn in workout?
Hi All, I'd like to know how many carbs do you burn vs calories while exercising. If I workout for 1 hour, burn 700 calories for example, how many grams of carbs that takes out of my body? If I eat 40 g of carbs b4 I go to the gym, I feel more energetic there. I don't want to eat too much carbs that can ruin the carbing plan. If I don't intake any carbs, I end up working out 1/2 the usual. Thanks, NewLife Uh You dont burn Carbs Do you even know what carbohydrates are and what they do? > Uh > > You dont burn Carbs > > Do you even know what carbohydrates are and what they do? Uh, actually you do... what do you think glucose is? Do you even know what carbohydrates are and what they do? :-)  SignatureSteve >> Uh >> [quoted text clipped - 3 lines] > > Uh, actually you do... Actually, your body doesn't burn anything. Unless you're in the middle of an episode of spontaneous combustion, of course. >>> Uh >>> [quoted text clipped - 6 lines] > Actually, your body doesn't burn anything. Unless you're in the middle of > an episode of spontaneous combustion, of course. From The Collaborative International Dictionary of English v.0.48 : Burn \Burn\ (b[^u]rn), v. t. ... 7. (Chem.) To cause to combine with oxygen or other active agent, with evolution of heat; to consume; to oxidize; as, a man burns a certain amount of carbon at each respiration; to burn iron in oxygen. From http://web.indstate.edu/thcme/mwking/glycolysis.html: The Energy Derived from Glucose Oxidation Aerobic glycolysis of glucose to pyruvate, requires two equivalents of ATP to activate the process, with the subsequent production of four equivalents of ATP and two equivalents of NADH. Thus, conversion of one mole of glucose to two moles of pyruvate is accompanied by the net production of two moles each of ATP and NADH. Glucose + 2 ADP + 2 NAD+ + 2 Pi -----> 2 Pyruvate + 2 ATP + 2 NADH + 2 H+ The NADH generated during glycolysis is used to fuel mitochondrial ATP synthesis via oxidative phosphorylation, producing either two or three equivalents of ATP depending upon whether the glycerol phosphate shuttle or the malate-aspartate shuttle is used to transport the electrons from cytoplasmic NADH into the mitochondria. The net yield from the oxidation of 1 mole of glucose to 2 moles of pyruvate is, therefore, either 6 or 8 moles of ATP. Complete oxidation of the 2 moles of pyruvate, through the TCA cycle, yeilds an additional 30 moles of ATP; the total yield, therefore being either 36 or 38 moles of ATP from the complete oxidation of 1 mole of glucose to CO2 and H2O. Stick to math. SignatureSteve :: Hi All, :: [quoted text clipped - 11 lines] :: :: Thanks, That's a really hard question to answer...however, if you're burning 700 cals in a workout and eating 40g of carb before (= 160 cals) i wouldn't worry about it too much as long as you're making progress toward your goals. Depending on what you weigh and what kind of workout you're doing, and what your general carb level and calorie intake are, 40 g isn't necessarily too much. However, if you're really concerned, try different amounts until you find the minimum that works for you. Note that some find that taking carbs AFTER the workout is more benefical that taking them before. You can also split them, taking half before and half after. Play around to find what you like and what works. One other thing....high intensity workouts tend to require more glucose than low intensity workouts. Hence, if you want to make sure you're burning the carbs, you need to shift your body more to a glucose burning mode than a fat burning mode. Slower, low intensity, long duration activity tends to favor the fat-burning mode, while high intensity activity favors the glucose burning mode. Many LCers find it more easy to do low intensity, medium duration activity as it uses mostly fat for fuel. If a LCer attempts high-intensity exercise, or long-duration activity, the demands for glucose from the muscles will outpace the body's ability to make that glucose (since very little is coming from diet). Hence, workouts of this type become difficult. Keep in mind that high-intensity exercise will impact fat loss by ramping your metabolism up so that more calories are burned AFTER the workout is over... Roger Zoul, thanks for your input. I was suprised by the person that said your body doesn't burn carbs. If not, then we should weigh 4000 tons by age 40. Roger, your asnwer is what I was looking for. Mostly, I do low intensity cardio and high intensity weight lifting with little reps and heavy weights. You mentioned 160calories == 40 g carbs. Is this a known formula? Thanks a bunch, NewLife > :: Hi All, > :: [quoted text clipped - 38 lines] > your metabolism up so that more calories are burned AFTER the workout is > over... >You mentioned 160calories == 40 g carbs. Is this a known >formula? > >Thanks a bunch, Pretty much. 1g of carb has 4 calories. Therefore, 4 grams of carb has 16 and by extension 40g has 160 calories. 400g carb has 1600 calories although I don't know many people who *could* stomach 400g of carb in a hit. Aramanth :: Roger Zoul, thanks for your input. :: [quoted text clipped - 5 lines] :: Mostly, I do low intensity cardio and high intensity weight lifting :: with little reps and heavy weights. http://forums.1fast400.com/topic1416_pf.html http://www.stumptuous.com/cms/displayarticle.php?aid=21 http://www.musclemedia.com/training/hiit.asp http://www.ruggedmag.com/index.php?type=Text&i=7&a=1 These might help you get more out of your cardio workouts. :: You mentioned 160calories == 40 g carbs. Is this a known :: formula? Yes, the other poster responded so i won't. :: Thanks a bunch, Good luck. > http://www.musclemedia.com/training/hiit.asp > > http://www.ruggedmag.com/index.php?type=Text&i=7&a=1 This is totally impossible for people with fibromyalgia and/or myofascial pain. Work is sometimes more work than I can tolerate. AK > Roger Zoul, thanks for your input. > [quoted text clipped - 5 lines] > Mostly, I do low intensity cardio and high intensity weight lifting > with little reps and heavy weights. FWIW, if you're doing that type of exercise, it's pretty unlikely that you're burning 700 calories per hour. That's a pretty high burn rate, and is usually only associated with intense endurance activities like running, or cycling at higher speeds. GG > You mentioned 160calories == 40 g carbs. Is this a known > formula? [quoted text clipped - 45 lines] > > your metabolism up so that more calories are burned AFTER the workout is > > over... |
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