Mates
I've been quiet on this subject lately and wanted some time to try and figure out a dilemma I'm experiencing. The dilemma is as follows:
I've been tracking my nutritional intake for several months now, and learning about myself, and how certain foods affect me. Some of you may be aware of the excel spreadsheet I use called the Macro Calculator. It details out all the foods you can eat, and tracks the macros on a per meal basis and a total for the day. It also calculates your TDEE, and protein requirement.
Over time, I was able to determine through experience my TDEE is about 3,100 cals/day. At this intake, my weight average fluctuation was constant for about a two month period, which validates 3,100 cals/day as my TDEE.
After determining my TDEE, I began to really clean up my diet. I came off whey protein powder entirely. My primary protein source became liquid egg whites and canned chicken. Both are more or less pure protein sources with no fat or carbs. Additionally, I switched from grain based carbs to fruit based carbs. Once I switched carb sources, my mood improved, and my energy levels in the gym increased. (I do not know if this is phenomenon is unique to me or is applicable to weight lifters in general.) Additionally, I wanted to slowly start a clean bulk, and so I upped my caloric intake 10%, from 3,100 to 3,400 cals/day. Previously, my macro split was the typical 40/40/20 and it became something like 50/35/15 in round numbers. And then something strange happened. My intended "clean bulk" had me losing a pound or two a month.
How can this be?
How can I increase my caloric intake 10% and slowly start losing weight?
Did the increase in my fiber intake have something to do with it?
Was there some characteristic of the grain based carbs I was sensitive to that slowed down my metabolism?
Was there something about the fruit that increased my metabolism?
I didn't know. But over a two and a half month period, I lost about 5 pounds.
I knew the answer was not due to a lack of protein. I was averaging over 350 grams of protein per day.
So I had to develop a theory.
NOT ALL CALORIES ARE THE SAME
This is the basis of my theory.
There have been a variety of studies centered around the optimal protein intake in a diet. The gist of the studies are to measure all the protein sources over a period of time, and monitor all the excreted protein over the same time, and then measure LBM. Not to go into all the data points, what they found is that once the optimal protein intake has been exceeded, the body actually begins to excrete protein. In stool samples and in nitrogen markers in urine. In other words, the body neither uses all the excess for protein synthesis nor fuel. The body simply eliminates a portion of the excess it cannot use. It is difficult for the body to store excess protein as fat, and therefore, in large part, what it cannot use, it loses through excretion. Be warned, this does not mean you cannot get fat by adhering to a carb free diet. It just takes more calories.
DISPLACEMENT
This is my second theory. If my theory is valid, then it seems my second theory should also be valid.
Displacement theory goes something like this:
If you keep your caloric intake the same, and instead change your macro split, shifting more towards protein and reducing carbs, your total caloric utilization rate will decrease. This means that as the composition of your calories shifts more towards protein, there will be less available from carbs, and therefore it becomes more difficult for your body to fully utilize all the calories. This effect is slight, and only becomes apparent when keeping detailed records of nutritional intake, and then limiting one's intake to TDEE. Then, this slight effect becomes apparent, with the loss of maybe a half a pound a week.
Here's what I think happened.
My protein intake shifted from 40% to 50% of my caloric intake. Plus my carb intake dropped. All in, I consumed something like 500 more cals/day from protein (remember to also include the additional 300 cals/day in increased above TDEE). But there is no way really for me to absorb 350 grams/protein per day. I'm estimating the portion above 1.5grams/day per lbm (300) for a total of 50 grams a day, was excreted. That's the equivalent of 200 cals a day or 6,000 cals a month.
Sanity test.
To lose one pound, one has to burn something like 3,000 or 3,500 cals. So two pounds, the amount of weight loss I was experiencing, comes to 6,000 cals or so.
So hopefully, in theory, this could explain why I was able to increase my caloric intake 10% and still lose 2 pounds a month. I was excreting 6k/cals/mo, which put me below my TDEE.
Now, if all this is true, then I need to look at the traditional rule of thumb that starts our macro split off at 40/40/20. The more I think of this, the more I don't like it. And in fact, for what we do as extremophiles, is just wrong.
To begin with, trying to find the right study to support what we need is a difficult thing to do. Many of the studies are set up correctly, but then use the "average" person which is ok for most, but not us. Then there are studies that measure grams of protein consumed against the body weight of an athlete, but that's wrong too. we need "LBM" not total weight, as the bf% of the athletes in all the various sports changes. Look at the NFL. Some of those boys are over 20%. Swimmers have a relatively high BF%. distance runners may have a relatively low bf%, but have type 1 muscle fiber type, which is not us either. So finding the right studies is a very difficult thing.
I did a lot of reading, and picked up factoids from a number of them. What I have learned, that for 99% of us here, 1.5 grams per pound of Lean body mass, is more than sufficient. There was one study that found benefit at 3.5 grams of protein per kg of lbm, but the exercise routines had them at almost total exhaustion over the course of the day. And the way they described the exercise routine made me realize it was extreme, even for us. So I'm still using 1.5 grams of protein per pound of LBM, but now, I realize it is not a "minimum" requirement. It is a MAXIMUM requirement, or a "not to exceed". Maybe that is what our nutrition guru here was trying to tell me, and somehow, the nature of this threshold got lost in the translation?
I'm going to set up three scenerios based on my personal stats, to illustrate why 40/40/20 is a poor macro target. The first scenario will be at TDEE, the second will be bulking at 500 over TDEE, and the third will be cutting at 500 under.
Scenerio 1 - TDEE
as you can see, my TDEE is 3120 and protein intake is 34% for a total of 265 grams.
Scenerio 2 - TDEE + 500
cals are now at 3620, protein is now at 29% even though protein grams hold steady at 265 grams
Scenerio 3 - TDEE - 500
cals are now at 2620, protein is at 40% and notice all through each scenario protein grams remain steady at 265 grams?
I believe this is a much more precise and benefit based approach to developing a macro based nutritional plan. The theory behind the carb/fat split is that carbs are consumed at twice the rate of fat based on calories.
Previously, at 500 over TDEE, I would have consumed 362 grams of protein using a 40/40/20, of which, almost 100 grams would have surely ended up in the toilet, and not used for protein synthesis nor energy. Which comes to 400 calories, and therefore, displacing carbs that could have been used for energy and help prevent my weight loss.
What do you blokes think?
---Roman