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RESEARCHSARMSUGFREAKeudomestic
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Question for the Cardio Gurus...

As I said before, it depends on your goals. JB3, what that study was pointing out was that moderate cardio exercise does not raise you BMR if you're male. Of course your BMR is determined to a large extent by the amount of LBM you carry, but LBM comes from weight training, not moderate cardio.

As for carbs and protein before interval training, these will both help with your performance and how you feel during exercize. Glucose is what your body prefers to burn, in fact it absolutely requires it for all out maximal short term effort. However, if you are primarily concerned with fatloss rather than how good your cardio experience feels, or how fast you run, then those extra carbs and protein will slow the rate of fat burning.

One thing that is important to distinguish is the difference between moderate cardio and intense sprints. Sprinting, IMHO, should be considered more as a type of heavy weight training. I think you get a similar increase in 24-48 BMR from sprint work as you do from weights. And since guys don't seem to get this increase in metabolism from moderate cardio, it makes a lot of sense for guys to stick to interval work. Like weight training, you need a decent meal a few hours before sprinting to get optimal benefit from it.

As far as physiques go, sprinters work tremendously hard to look like sprinters! They now spend more time with the weights than they do sprinting. Endurance athletes avoid weight training like the plague because all that extra muscle carried over a long distance is a waste of energy.

Now what does this have to do with women? I think anyone who has worked with women who are not on AS will tell you that women respond better to moderate intensity, longer bouts of cardio (I'm speaking strictly in terms of fat loss, not performance). Personally, I mix it up. I like to start with interval work to warm up and deplete glycogen quickly, then decrease the intensity and hang out at moderate pace for the rest of the session. It works for me anyway.
 
MS,

Thanks for the explanation of the study. Yes, I'd agree that moderate cardio has very little affect on BMR.

Let's discuss something, however. You said (as does almost everyone on this board) that ingesting carbs before cardio will reduce the amount of fat being used as fuel during exercise. So, let me get this straight...

Day A: I eat nothing before cardio and maintain 65% MHR for 60 min.
Day B: I eat 25g of carbs before cardio and maintain 65% of MHR for 60 min.

Are you saying that my body will somehow use a different fuel pathway for Day A compared to Day B? How is this so? Shouldn't the pecentage of fuel from fat be exactly the same no matter what I've eaten beforehand as long as the workout intensity and duration are exactly the same?

Does not total calorie intake (burned>eaten) determine weight loss? So why do you mention that "carbs and protein will slow the speed of fat burning"?
 
"Are you saying that my body will somehow use a different fuel pathway for Day A compared to Day B? How is this so? Shouldn't the pecentage of fuel from fat be exactly the same no matter what I've eaten beforehand as long as the workout intensity and duration are exactly the same?"

Blood glucose/insulin inhibits lipolysis. As you use up your free glucose and stored glycogen, your body will increase the % of fat mobilized for energy. Basically, anything that raises your blood glucose levels will to a greater or lesser extent inhibit fatloss. You have to balance this up with the need for glucose in the muscles during all out anaerobic bursts (ie sprinting).

"Does not total calorie intake (burned>eaten) determine weight loss? So why do you mention that "carbs and protein will slow the speed of fat burning"?

Total calories burned=weight loss if greater than total calories consumed. That is true. But weightloss does not always=fatloss. But as I've said before, if you're sprinting and weight training, you will likely be raising you BMR. Remember that you burn the greatest % fat while at rest. So if you can increase your resting metabolism, this will have a larger impact on your ability to lose fat, even if you're not losing it all WHILE you're doing your sprints. Make sense?
 
MS--you have such a great way of putting techie stuff into clear prose. Are you going to write a book! I wish you would.

------------------
It's not funny, like on TV, and it's not smart, like it is in books.
 
ok, so morning cardio on an empty stomach IS very efficient in cutting down bodyfat, right. yesh. BUT how do i decide the intensity????

2 scenarios (i've gathered from this thread... great info, btw ;) you were so right, warlobo):

(1) walking at a moderate pace will burn MORE fat WHILE walking but LOWER your BMR = losing less fat during non-workout time;

BUT

(2) jogging will burn LESS fat WHILE jogging but INCREASE your BMR = burning more fat during non-workout time...

MY QUESTION:
then i f my goals are to drop bf%, look lean, but retain muscle, should i then consider jogging in the a.m. and lifting maybe heavier to compensate for the muscle deterioration due to catabolic activity????

i have gotten lazier with my cardio intensity and have recently taken up treadmill inclined walking (15% incline at 2.6-2.8 speed for 30-45 min. after weights... 60 min. on mornings when i only do cardio) but see, i HAVE noticed that i do NOT look as lean as i do when running but i definately look more muscular. hmmm.

goals: drop bf while retaining muscle.

thanks :D

oh, one more thing: keiko's got a sweet idea. c'mon ms. you'd make many of us smile. make some literature, babes!!!
 
Sweets, If you have close reread of some of the stuff that's come out in this thread, you will see that moderate intensity cardio increases the BMR of women, but not men. So if you're a female, just make sure you do some cardio (high or moderate intensity, or both).
 
i'm slipping. :eek: sorry, but my question remains...

would i need to lift heavier in order to compensate for muscle loss if i choose to run rather than walk???? just wondering how far muscle loss really goes when choosing to do a catabolic exercise. my body just gets quicker and more noticable cutting results with higher intensity cardio. thanks, ms. :)
 
sweets said:
...jogging will burn LESS fat WHILE jogging...

This is a common misconception. :rolleyes: Jogging will not burn less fat than walking. Walking will burn a higher percentage of fat, but jogging/running will burn more fat and calories.

I'm not going to get into specific numbers because every individual will be different. However, speed and calorie burn are not linear. For instance, you'll burn more calories running @ 7mph for 30 min than walking @ 3.5 mph for an hour. :)

Think about it... would it be easier to walk 10 miles or run 10 miles? Forget about time. Which one would you be able to complete? Running is way harder, right? That's because it takes more energy to move quickly vs. slowly. :eek2:

What's my point? I believe cardio is best done at the maximum intensity possible for 20+ minutes. This will fall under your lactate threshold (which is roughly 80-85% of mrh), or may higher and return below if doing intervals. Which ever method you choose, do it at the highest possible intesity you can hold for the alotted time. If I'm shooting for 30 min, I'll obviously run more slowly than if I was shooting for 20 min, but I'm going to run as fast as possible - under my lactate threshold.

I also believe cardio should be done after lifting or later in the day 3-4 hours after eating. I've tried morning cardio before eating and it makes me feel like total shit. I have no energy, my lactate threshold is much lower; thus, my intensity is affected, causing a poor workout. Also, I'm usually nauseous afterwards because of the low blood sugar. It's not for me. Ask yourself this question: If I had eaten 100-200 calories before this morning cardio, would I have been able to perform at a higher intensity and burned off those extra calories... and felt better in the process? Calories are calories are calories. No matter when you eat them, a caloric deficit equals weight loss.

I'll step off my soapbox now. :angel:

Peace.
 
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you're very right, jb3. about 98% of the time, i fell soooo nauseous from an intense a.m. workout on an empty stomach that i'm forced to cut my cardio in almost half, lasting only 30-45 min max. i definately workout better when fed. (yummm. now i get to eat my breakfast in peace ;)). i will keep it small, though. thanks.
 
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