mrsveteran (mrsveteran) wrote,
mrsveteran
mrsveteran

Dietician Day: The Answers



She looked at my Fitday journals for the last few weeks, and said I appeared to be doing fine, although she said I should really TRY very HARD to have at least one serving of an actual fruit or vegetable each day. I think you're technically supposed to have -- what -- 2 - 4 servings?, but she said to start small and try for one. :-)

I now have a fridge drawer full of tangerines, oranges, and nectarines. ~sigh~

She said that Apple-flavored soy protein shake does not count as a serving of fruit.

Oh, and this wasn't on the list of questions, but for the ladies, I found out that your metabolism increases around and during those monthly visits from Aunt Flo, so if you get the chocolate munchies, go with it. :-)

And, here are the questions and the answers:

As long as you're getting enough carbs/protein/fat and enough vitamins and enough calories in a day, does it really matter where you get them from? (E.g. carbs from doughnuts, protein from ice cream. :-))


Yes, it does matter. You can take Vitamin C, for example, but there are other chemicals in, say, an orange or tangerine that are good for your health. On the whole, it is really better for you to eat a balanced diet of actual foods (meats, grains, dairy, fruits, vegetables) than it is to get your protein from a protein shake, your vitamins from a multivitamin, etc. Protein shakes and vitamins are supplements, meaning, they should supplement a slightly less than balanced diet, not fill in for your whole diet.

On the other hand, if your choice is between not getting enough carbs/protein/fat/vitamins AT ALL and getting all your protein from ice cream, your carbs from doughnuts, your fat from half a bottle of flaxseed oil, and your vitamins from a multivitamin, that is moderately better than starving or not getting your nutrient requirements at all.

Note that I said, it's moderately better. Still no excuse for not eating a balanced diet. Dammit.


Should you eat several small meals, or a couple of big ones, and does it really matter?


Ready for this one? It doesn't really matter.



Actually, that's not true: it matters, but is completely dependent upon the individual. If you start to have symptoms of low blood sugar (lack of energy, headache, that kind of thing) every couple of hours, you should probably eat every couple of hours. Each person needs to listen to their own body's signals regarding when the body needs fuel. Some people don't really need to eat more than a couple of times a day. Depending on what they eat, they may have enough fuel to go on just fine. Other people may need to eat every hour.

Everyone's metabolism and fuel intake needs are different: there is no "One True Way" that fits for all people.



What is a good eating plan (carbs/protein balance) for X workout schedule? (In other words, how long before/after a workout to eat, and what?)


In general, you should eat a balanced diet with more calories than you need if you want to gain weight, and fewer calories than you need if you want to lose weight. She said that 30% of calories from fat, 30% from protein, and 40% from carbs is reasonably balanced, although a little low on the carb side. So, if you're eating 3,000 calories a day, you need to up your protein to a level higher than if you were eating 2,000 calories a day.

She recommends having 15 - 30 grams of carbs 1 - 2 hours before a workout, but people's digestive systems differ, so this is something each person needs to work with. If you're really exhausted and lagging in your workout and can't wait to get done, you probably haven't had enough carbs. If you're really energized after the first couple of minutes, you're probably okay. Again, it has a lot to do with getting to know your own body's needs and signals, rather than a hard-core number.

Surprisingly, she also says that you should have carbs around 2 hours after a workout as well. There's a common perception in the bodybuilding field that you need to have protein right after a workout: she says that's a myth. I thought that was interesting.



To gain muscle bulk without adding fat, what's the best thing(s) to eat?


The exact same balanced diet you would use to lose weight or maintain weight, but more of it. You'll always tend to gain at least a little fat along with the muscle, but if you're doing heavy weight lifting, you need those extra calories to gain muscle mass.


How many calories should I be eating in a day to maintain my weight?


She said I was pretty much right in line with my Fitday numbers. In other words, between 1500 and 1700 calories a day.

~sigh~

If anyone would like to know an approximation of their basal metabolic rate, Fitday's estimates are not too bad, but you can't take it down to +/-3 calories or anything. The best thing to do is have a BodyGem test done, next best thing is maybe an average of the Harris-Benedict equation and the "Fat-free mass formula" (RMR = 1.3 * Fat Free Mass (in kg) * 24) if you know your body fat percentage. This page from BodyBuilding.com calculates your RMR using several methods, and tells you the average. The Fat-Free mass formula has been the closest to the BodyGem results FOR ME. Your mileage may vary. If you scroll down a bit more on that page, there's also an approximation of how many calories over and above that you need for your lifestyle, what kind of work you do, etc.


WTF is this stupid Fitday "lifestyle" number based on, and choosing "bed bound," should I put in 8 hours of typing in the activities section to keep more accurate account of my caloric needs?


The Fitday "lifestyle" number is pretty much based on the Harris-Benedict equations. She actually said that the "sedentary/bed-bound" number seemed to be more or less appropriate to my work life, and that I could put in 8 hours of typing a day as extra activity, but that would probably skew the numbers.

Dammit.


Is that 3500 calories per pound thing for gaining muscle as well as losing fat?


Actually, no. A pound of fat is 3500 calories, plus or minus. In other words, you need to eat 3500 extra calories to gain a pound of fat, and 3500 fewer calories to lose a pound of fat. To gain a pound of muscle, it's about 2400 extra calories. Say, 300 extra calories a day with at least one hour a day total workout, including both cardio and weights, to gain a pound of muscle in a week.

Again, there's no set number, unfortunately. People's bodies react differently, but that's sort of a guideline.


Do you need more vitamins on an over 2000-calorie a day diet? (I know zoot answered this, but I'm interested in what her opinion might be too.)


Nope! The RDA/RDI/whatever you call the recommendation for various vitamins nowadays is based on what will meet the needs of like 98% of all adults. Take that multivitamin, and you're probably stoked except for calcium and a few other things.

So why do they all say "Based on a 2000 calorie a day diet?"

The way she explained it to me is this: If you eat 2,000 calories a day, AND you are eating those 2,000 calories out of the "food pyramid" or whatever (X servings of this, Y servings of that, dairy, breads, fruits, veggies, meats, yadda yadda) then you'll likely end up getting 100% of your daily recommended vitamins and minerals and so forth automatically. So, it's not so much "if you eat 2000 calories, you need X vitamins," as it is "if you eat 2000 calories in the right way, with the right foods, you'll GET X vitamins."


Questions about target heart rate and MET level, like, if you're at 85% of your maximum heart rate, can you call it "jogging" (referring to the intensity level and how many calories you burn doing it) even if you're just walking really fast? :-) If one guy is at 85% of MHR while jogging at 8mph, but I'm at 85% of MHR while walking at 4mph, are we exercising at the same intensity/burning the same number of calories, etc?


The short answer is that if two people are doing the same exercise at the same level for the same time, and those two people are the same height/weight/gender/age/what have you, it's going to end up being around the same number of calories for both, EVEN if one person is really out of shape and half killing themselves and the other person is a professional marathoner. The reason for this is that the marathoner, while not having their heart rate up as high as the out-of-shape person, and not exercising at the same "intensity", still has more muscle mass than the out-of-shape person and so will burn more calories at a lower intensity. These factors tend to even things out.

She also said that it's hard to definitively categorize intensity just based on heart rate, but in general, if you can hold a more or less normal conversation, you're probably at a light-to-moderate intensity. If you can only hold a conversation a word at a time with several breaths in between, that's probably a "vigorous" intensity. Based on this, and the MET levels, you can get an idea of how many calories you're burning at that level of exercise.


How much calcium do I need? (RDA says 1200, other places say 1500 ... )


She said that for most women my age, 1200 a day is just fine. 1500 is no big deal, but that you shouldn't try to go higher than that. Some people taking 2000+ mg of calcium a day have problems, because calcium at high levels can bond to other needed vitamins or nutrients or something and cause you issues. She recommended that I get a baseline bone density scan done, and if it's low, then maybe consider going up to 1500. For most people, though, if they're not at risk for early osteoporosis, the RDA is fine.



Is it true that you burn fat for energy after exercising for over 30 minutes, but not until then?


Pretty much, yes, except that she thinks it's probably closer to 20-25 minutes. Basically, what happens is that your muscles have a certain amount of fuel available to them at any one time. This fuel comes from chemicals that hang out in your muscles, and your liver, and food in your intestines, and all over the place. It takes about 20 - 25 minutes or more of using your muscles before your muscles need to find another source of fuel, and that's when it starts burning your fat stores.

So, the good news is, any calories burned in exercise over 25 minutes or so are coming right out of your fat.

The bad news is, you have to exercise over 25 minutes just to get there. :-)

Also, in case someone asks, it doesn't make much difference if you exercise first thing in the morning before you eat, or at the end of the day after eating. It's still going to take you around 20 minutes to get into fat-burning mode.
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