Tuesday, May 15, 2012

The Basic Fundamentals


Everyone wants the magic bullet diet.  And given the choice of doing things the easy way or doing things the hard way, most everyone will choose doing things the easy way.  Work smarter, not harder, right? Unfortunately this leads people down paths that won’t work in the long run, or that would never work in the first place.  Sometimes it’s a quick temporary fix that gets results the first week or two but is complete unsustainable.  To be blunt, there is a lot of money in industry, be it weight loss, athletic performance or body building.  Health and performance supplements, fad diets, special exercise routines and equipment and energy boosters are everywhere, and there are plenty of wolves in sheep’s clothing that are eager to cash in.  Snake oil has been sold for longer than any of us have been around.  And one thing that people always seem to lose sight of is the old adage “if it seems too good to be true, it probably is”.   But people have a tendency of believing in magic, it’s potentially hardwired into our brains1.  We all want to believe there is a magic drink that can make better faster stronger… and thinner smarter and richer. But the reality is that there is no simple solution.  It does take hard work- so it’s not really a matter of working smarter, not harder; it’s a matter of working smart and hard, or working way to hard and hindering your results.  So how do you prepare yourself for this battle?  Everybody is different, and specifics can be adjusted to the individual, but a general guide still stands.  If you have a specific question pertaining to yourself, please contact me.  I present the basic fundamentals.

Goals
To have the best chance of hitting a target, you have to aim for it.  If you don’t have a target, you will need the best luck in the universe to hit it.  So figure out what you want to do and plan accordingly.  There are a few general categories that are the main focus, although people typically will have overlap, or want to do a variety of things at once.  Unfortunately, that will complicate things and perhaps hamper efforts, particularly if you want to bulk muscle and lose fat at the same time.  It’s much simpler to pick one or the other, reach your goal, and then switch.   So what is your goal?  If you want to lose weight, just stop reading now, I have a simple solution- amputation (if you think you want weight loss, you probably mean you want to lose some fat). For goals were nutrition would be related, I would break the possible goals down into four categories:.

1.       Look good naked (fat loss)
2.       Athletic Training/ Performance related
3.       Muscle building/ Bulk
4.       Health

There is some overlap between all these groups, but generally speaking, an ideal diet and regiment will probably differ between each goal.  The optimum diet for athletic performance might be healthy, but not as healthy if you were only concerned with health.  As mentioned before, it’s rather difficult to lose fat and add muscle simultaneously, and the structure of those regiments would typically be different.  Additionally, the most optimal way to add muscle might not be the healthiest way of eating.  I’ll address this more at a later time.  Of course there will be some variation and tailoring that needs to be done depending on where you start as well.

Tracking
You can’t adjust variables if you don’t track them.   So where are you starting? You should know where you’re going, and how to get there will depend on where you are at.  And the path isn’t always a straight line.  There is variation and chaos in life- things happen, unforeseen winds will blow and cause a shift.  You need to track your journey so you at least have an idea of the direction you’re going, if you are still going towards your goal, or if you got turned around.  It can help you compare small incremental tweaks to help you optimize getting to your goal in the fastest way for YOU, based on your results.  Depending on your goals, and perhaps level of OCD, you should at least write down your starting weight and measurements (percent body fat, body dimensions like waist, chest, arms etc), pictures are great, a rough dietary guideline of what you ate before your diet, your plan for dieting,  and perhaps your athletic measures (number of pushups you can do, 5 rep max on squat, or 100 m time).  An exercise log is very important, to track everything at every workout.  At most you should have a food log documenting calories, macronutrient break downs, and the time of the meals.   How much sleep are you getting and how much water are you drinking. Are you stressed from whatever reason?  Make a note.   Some people don’t have the time, energy, or can get themselves overly stressed worrying about counting calories and meeting their targets.  Still right down an outline and stick adamantly to it and watch for results- adjust as necessary.  You can’t adjust variables if you don’t track them. 

DIET
To keep this from blowing up into a huge post, I will summarize some general guidelines- I don’t think these are exactly set in stone, and again, if you have a specific question pertaining to yourself, please contact me. 

The best diet is one that you can adhere to2 that meets your goals.  And if you haven’t figured it out (take a deep breath) it’s going to take some work and dedication to get results.  There are two main ways to go for fat loss.  Both will work, and sometimes a combination works best. The two options are elimination and caloric restriction.  If you are trying to look good naked, pick either one of the options.  If you are trying to go healthy, go for the elimination and check out my previous posthere.  If you are training or bulking, you really need to count calories.

Elimination:
If you don’t like to obsess over every calorie and don’t want to have to log all your food, do an elimination diet. For the elimination flavor go paleo.  Eat nothing but meat and veggies, some fruit, nuts and seeds and that is it.  No grains (including corn) legumes or dairy, and definitely NO sugar. Don’t gorge yourself, but eat reasonably when you are hungry.   

Caloric Counting:
If you want to look good naked and want more flexibility in what type of foods you eat, go with caloric restriction.  Start off with figuring how many calories you currently eat or need, and then cut them by about 20-25%.  You could use Google to find an online calculator that will guess your total daily energy expenditure, but know this; there is a large amount of variation in people’s basal metabolic rate3, which is by far the largest component of daily calories (unless you are training for the Olympics).   Due to the variation, the equations don’t mean too much and you can estimate just as well, and make adjustments based on your personal results (gasp).  The conventional wisdom is that your maintenance caloric intake is about 14-16 calories per pound, and a decent caloric deficit is about 20-25% less than that, or around 10-12 calories per pound.  Start there and give it a few weeks- if you have a lot to lose, and you are losing more than 2 pounds a week, bump the number up a bit.  If you are losing too slow, bump it down.  There are some caveats here, it’s not a free pass to eat all your calories from ice cream, which would result in metabolic derangement, and other issues I’ll go into in later posts.  Ideally you should be eating as much whole food as possible, lots of meat and veggies, in fact, mostly meat and veggies.  It will help with feeling full when under a caloric defficit4 among many other benefits of protein I’ll be continually addressing on the site. Try to get a gram of protein per pound of body weight. No, it’s not bad for your heart5 or kidneys6.  Try to split the remaining calories between carbs and fat, about equal number of grams of carbs and fat.  Limit carbs unless you are working out, and try to plan for a day of higher carbs and calories on the days that you will be working out hard, maybe once a week. It will help with cravings mentally, and physically with your recovery.  Again, adjust based on how you feel.

 Figure out what you think would work best for you and pick the flavor you like. Stick with it for at least three weeks before you try to make any changes so you can judge how it has been working.  If you need help, ask me.

If you are training or bulking follow the same above advice but adjust your caloric intake target.  Go for maintenance, 14-16 calories per pound, plus a bit for athletic training and add a little.  It gets a little fuzzy about how much to add, it will all depend on how much and what type of training you do.  If it’s non-body building, you are probably going to need a fair amount of carbohydrates to replenish muscle glycogen stores to have enough energy to keep them firing.  Get a good dose before and after your workouts, probably around the same ratio of protein to carbs. Adjust based on your performance and physical changes. 

For bulking or muscle gain, the best way is to do it slow and steady, so you avoid gaining to much fat with the muscle. Go for maintenance, 14-16 calories per pound, plus about 20% on workout days.  Eat about 1.3-1.5 g of both carbs and protein, with the bulk of your calories coming close to your completion of weight training.   Make sure that you give yourself at least 50 g of carbs and protein before the work out too, so you have energy for the workout.   On rest days try for about maintenance, and keep the carbs low, maybe about 100 grams.  Again, guess what- you should adjust based on your physical changes, making sure the gains are mostly muscle and not at such a rapid rate that there is significant fat gain as well.  You should also be putting weight on the bar on a regular basis- if you’re not, eat more.  


Exercise
Yea, you should exercise.  This section will be predominantly aimed at the look good naked dieter, as the athletic trainer and muscle gainer probably already have signed onto the concept (but they should pay close attention to the comments about meal timing).  Again, the best exercise is the one that you will consistently do, but I recommend weight training, three days a week for an hour were you really push yourself.  Of course, adjust as needed.  If you feel you are not recovering, dial back to maybe fourty-five minutes, or cut a day, but for initial stages of weight loss, just three hours a week should be perfect.  More might risk burnout or over training.  Under a caloric deficit too much exercise will be counter productive.

Before I get to deep into the reasons why I’d recommend weight training, and weight training over aerobic activity, I’d like to mention that getting some protein before and after your workout is very, very important, specifically metabolicly7.  Additionally, there are benefits of ingesting carbohydrates post exercise as muscle glycogen (muscle energy) uptake is increased without any negative effects of insulin 8, 9

So why weight training?  Well for one, muscular strength seems to be reversely correlated with obesity10.  Not only that, increased muscle from resistance training increases beneficial metabolic parameters11 and can increase testosterone, growth hormone, IGF-1 in men creating benefits in later life12.   These health benefits (also including the cardiovascular benefits13 superior to that of aerobic exercise) will also aid in weight loss, but one of the dominate reasons is the increase in metabolic rate (the calories your body burns) after the exercise.  This effect is known as excess post exercise oxygen consumption, or “EPOC”, what many people refer to as the “after burn”, the calories you burn from exercise after you are done exercising.   Intense resistance exercise for less than an hour has been shown to burn significant calories over the next fourteen hours, increasing the energy expenditure by 37% over the initial resistance exercise14.  This could add up to an additional 250 cals burned after the workout.  Just sitting around doing nothing, the weight training will continue to burn that many more calories!  This is more advantageous for anaerobic (resistance) workouts compared to aerobic workouts.  Comparing anaerobic and aerobic workouts of equal work, anaerobic exercise used nearly twice as many calories15.  Not only does the anaerobic workout use more calories, the EPOC is significantly higher, one study showing an anaerobic workout to have over five times the EPOC than an aerobic workout15.  My final argument for resistance training over aerobic training comes from a large study data showing that there is little to no difference in weight loss by adding aerobic exercise to a diet for weight loss (additionally, diet alone was far superior than attempts to lose weight by exercise alone)16.

Ok, that’s it.  More details to come in smaller, more specific chunks.





Friday, May 4, 2012

Multivitamin Risk Suggests It's Better to Eat Your Veggies, Fruit and Meat


A new study published today in the journal of biological chemistry brings up questions about the benefits of taking a multivitamin.  I am of the opinion that under most circumstances people shouldn’t be taking a multivitamin- it’s a bit of a crutch- all the necessary vitamins and minerals should be ingested from a well balanced diet of lots of veggies, fruits and meats (I discussed it briefly in aprevious article).  Why should we take processed chemically manufactured substances , especially when we can get the same thing in a natural form?  Some of the available research supports some of this concept.

The study suggests that large amounts of ß-Carotene acts as a blocker of vitamin A, and this in turn can increase the risk of cancer1.  The mechanism they propose support previous research that showed increased rates of lung cancer and cardiovascular disease2.    

These are not the only studies to show some of the potential detrimental effects of supplements.  A study published last year showed an increased risk of prostate cancer in healthy men that supplement with vitamin E3
The results of an Iowa women’s health study on the effects of multivitamins and individual vitamin and mineral supplements showed that a multivitamin, vitamin B6, folic acid, iron, magnesium, zinc and copper were all associated with an increase risk of total mortality4.

Now I don’t want to sound alarmist.  There are definitely reasons why some people may need a supplement or could benefit from a supplement (consult your health care provider about this, but make sure to bring up the potential risks associated with supplementation and perhaps try to find a dietary path to increasing any insufficiencies you may have).  There could be various confounding reason as to explain some of the negative effects of supplementation.  But again, multivitamins shouldn’t be used as a crutch or an “easy way out”.  Eat a colorful palate of veggies and fruits, lots of meat, and you will be getting all the vitamins and minerals you need, from a natural source.

Thursday, May 3, 2012

Over Simplification of Energy Balance & the First Law of Thermodynamics


There are many variables that go into any type of diet.

All too often people try to describe complex things in the world in terms of black and white.  This is particularly true with dieting, specifically the two sides of the “caloric balance”.  One side says “eat less, move more” and one side says “eat this not that”.  The “if it fits your macros” camp will tell you that as long as you eat fewer calories and exercise a lot, you will lose weight.  The “good calories bad calories” will tell you to avoid processed foods and eat lots of veggies and healthy meats and you will lose weight?  Who’s right and who’s wrong?  Both!  

It really doesn’t take too much reason to find flaws in both camps- they do it to each other all the time.  If you give a severely obese child nothing to eat but Snickers, Doritos and Coca-Cola (making sure it’s around a 20% deficit of total daily energy expenditure, let’s say around 500 calories less intake than expended) will the kid lose weight?  Likewise if you gorge yourself on fresh fruits, veggies and meat at a 1000 calorie surplus on a daily basis, will you lose weight?  Let’s take a closer look at some simplified equations to perhaps find an answer.

First off, if someone tells you that weight loss is easy, it’s all about the first law of thermodynamics you should at minimum walk away from them, probably run.  Before hand I would suggest laughing at them, or perhaps giving them a good smack.  There are so many people who have become experts in the field of weight loss and will prescribe simple solutions such as “eat less and exercise more, it works because of the first law of thermodynamics. ”  I find this slightly offensive, and as an engineer that is gets paid on a daily basis for doing actual real work involving the first law of thermodynamic, I tend to want to strangle people who mention this. 

The first law of thermodynamics states:

“THE INTERNAL ENERGY OF AN ISOLATED SYSTEM IS CONSTANT”

Mathematically:

dU= dq + dw

The equation can be verbalized as the change in internal energy of a closed system (U) is equal to the energy that passes through its boundary as heat (q) or work (w).  For the non-math geeks, the “d” in before U, q, and w is basically denoting a small change or differential.

What people are really trying to invoke is energy balance- and there is a difference.  The first law of thermodynamics is a descriptor for a CLOSED thermodynamic system.  That means there is no mass exchanged between the outside of the system and the inside of the system.  Obviously, people who say weight loss is all about the first law of thermodynamics really don’t know the first law, don’t know what they are talking and perhaps don’t understand matter is typically both inputted and outputted from humans, despite the fact that they may lack the output as they are most likely full of $#!T.  While the first law does imply energy conservation, it is in terms of the change in the internal energy of a CLOSED system being equal to the heat added to the system and the work done by the system.  Honestly, it’s not built to be applied to the human body- it’s a little bit of a stretch to do so.

What they are really after is the energy balance equation usually stated in some form of “you have to burn more than you consume”, or “If you take in more energy than you burn, your body will store the excess as fat.  And likewise if you don’t take in as much as you need, your body will burn fat”.  Again, this is a simplification and almost seems to imply causation. 

Our bodies are really chemical reactors, and we can create equations to account for the conversation of energy and mass.  This is standard operating procedure for chemical engineers. The balance equation should really be stated more along the lines as

Energy Input to the body = Energy Output from the body +disappearance of energy by chemical reaction within the body + Accumulation of energy within the body

There is nothing in the energy equation that directly accounts for mass.  The mass balance must be performed similarly,

 Mass Into the body = Mass Out + Mass loss due to chemical reaction within the body+ Accumulation of Mass within the body

The two equations relate to each other in terms of the chemical reactions that take place in the body.  To put everything in terms more closely related to the human body we will structure the above equations to simplify things a bit:

Calories In = Calories Out + Net Change in Mass

Now I’m all for simplification and assumptions, however the fastest way to the wrong answer is oversimplification and the wrong assumptions.  The first problem is simplification of the “calories out” term.  Calories Out is made up of more than just exercise (exercise for most people is actually a very small percentage of the total).  The majority of calories out for most people will be due to basal metabolic rate (BMR), the daily energy requirements for the functioning of all our organs.  Additionally there is the thermic effect of food (TEF), basically the energy required to process food ingested.  Finally calories are used for external work, basic physical activity.  Some sources will refer to this as physical activity level (PAL), some refer to the Thermic Effect of Activity (TEA).  Some researchers have further tried to complicate the activity breakdown by including Non-Exercise Activity Thermogenesis (NEAT) or Spontaneous Physical Activity (SPA).  So substituting these new terms into the balance equation we have

Calories In= BMR + TEF + PAL +SPA + Net Change in Mass

Rearranging this so we can see it in terms of mass change:

Net Change in Mass = BMR + TEF + PAL +SPA  - Calories In

The “eat less exercise more” people will assume that food in and energy used on exercise are the only adjustable variables in our equations.  In fact, most of these terms are interrelated, and changing one will most likely affect another. 

For example, doing a lot of hard “metabolic conditioning” type training, something like Crossfit, or P90X, will burn some calories (PAL goes up) will also deplete muscle glycogen stores and lower the metabolic rate (BMR goes down!)1.  To complicate things even more, prolonged light exercise has been found to increase metabolic rate2.  So studies have shown that increasing PAL can both increases and decrease BMR.  It has also be proposed that increase in physical activity results in less weight loss than expected due to changes in other components of the energy balance equation9.

Not only does exercise affect metabolic rate, but the food you eat after your work out will also affect your metabolic response- a carbohydrate reefed after exercise will increase BMR1.  In fact, it has been regularly argued that the makeup of the Calories In macronutrient profile (protein, carbohydrate and fat) can affect weight change due to energy inefficiencies34, 5

This leads into the TEF; any change in calories in will also change the TEF (less food, less energy to process it, more food, more energy to process it). Additionally, not all calories will be processed (chemically reacted) by the body in the same way, and the efficiencies of these reactions will be different.  So by changing the composition of the calories in, the TEF term equation will be altered.  For example, it has been shown that whole food has a much larger effect than processed food6.   More specifically, the thermic effect of protein is 20-35% of the calories, 5-15% for carbohydrates, and 0-15% for fat8. This is basically to say for every 100 calories of protein ingested, 20-35 calories must be used by the body to process it. To further complicate things, TEF is not only dependent on the type of food, but on the person eating the food- people with insulin sensitivity and obesity have a blunted TEF7.

Increase in caloric intake may also cause some people to fidget or move around more, burning calories and becoming resistant to weight gain when overeating10.  Thus, increasing the Calories In, may, for some people, affect the amount of spontaneous physical activity, and thus change how many calories may be burned.

In conclusion I would like to summarize that the energy balance equation does hold true, however, it is not as simple as most people make it.  A calorie really isn’t a calorie (not even mentioning some of the psychological aspects).  Changing the exercise and amount of calories ingested, and specifically the type of exercise and calories ingested, will have effects on other components of the energy balance equation.  To from an article by Dale Schoeller quote “Using the energy balance equation to predict weight change when only energy intake is know or when only energy expenditure is know is not valid because that calculation makes the assumption that the other term will not change… because changes in any one term often are met with a response that counters some of the effect of that change on energy balance.”11

When you get down to brass tacks, both the calories you eat, the type of calories you eat, the exercise you do, and the type of exercise you do, all in combination with each other must be taken into account for weight loss and optimum health.  Not everyone can blindly eat less and exercise more, or only eat healthy.  Granted, if it works for you, then all is well.  But it may not be as easy for all people.  Some people can get away with eating anything they want and exercising away the fat, however they are few and far between.  There are people who eliminate sugar and processed carbs from their diet and the fat melts off, but not everyone has the will power.  There are many variables that go into a weight loss diet (or weight gain/bulking diet), and the key is finding what works for you.

As for our two examples in the second paragraph, I’ll let you decide.