Energy Considerations in Nutrition: BMR, RMR & Physical Activity – Nutrition | Lecturio

In this lecturewe will be reviewing some of the vigour considerations relative to nutrition that you need to have rightin your pocket for your medical licensingexams. These things include basalmetabolic rate as well as mas mass index, total vitality expending, as well the fuel caloricvalues and so forth. So moving into lookingat basal metabolic charge, most often we'll considerresting metabolic proportion. Because it's the much moresimple measurement to manufacture. Resting metabolic proportion doesn'ttake into account having to have 12 hours of fasting and necessitate 8 hoursof sleep. It's a simple measurement takenupon waking and coming up. So resting metabolicrate is generally, we use in an equationto calculate our basal metabolic proportion. But if we are going todo it awfully clinically, we would measure the VO2 atvarious meters, on numerous daytimes. But again we will generallyuse an equation to calculate basal metabolic frequency. And I'll introduce you toor help you review two of them that will be important for youto keep in mind. This first one, you probablyjust need to know the name of.But if you want to gobeyond that, you could memorize the equation. We're not going to spendthe time deriving it. But it takes into accountthe age of the individual as well as the gender weightand height. And you can see that thereis an adjustment over there on the right hand sidebased on the gender. Whether it's a male or a female. And again you don't need tounderstand where the numbers come from. It's a push andchug kind of thing, Measuring height in centimetersand value in kilograms. More usually, these days thoughthe KatchMcArdle formula is utilized in which we considerpretty standard numbers. Basal metabolic charge equals 370+ 21.6 timesthe lean mass in kilograms. The catch here is that we haveto know the body fat percentage. And that turns out to benot so difficult to ascertain these days.Of course you can doCaliper testing but there are bioelectrical impedance maneuvers that cases can precisely holdon to and we get a reasonably nice calculate or at least relative estimateof the body fat percentage. So we can calculate lean mass by subtracting the body fat percentage. So KatchMcArdle is the oneI would certainly commit to memory and be maintained in your pocket for use on your exam. Now total vigor expenditureis the energy we use beyond our basal metabolic requirements. Plus, all the other thingsthat we do in a daylight. So all our caloric needsover a 24 hour season, first of all you probablyrealize but perhaps haven't “ve thought about it” in the totalenergy expenditure realm. That when we consume food itactually expenditure as calories to consumeand digest that menu. So that is the thermiceffect of feeding. And that's about a 10% ofour total energy expenditure in a era. Now of course in addition to that we have some physical activity. Some of that physical activityis activity that we have decided to do as we move around.But even when we are sitting still, we are still burning calories. And we need to addthis physical undertaking, whether it's intendedexercise or general mobility, we need to add this toour basal metabolic frequency. So there's the componentof physical activity that we announce NEAT. Another call you shouldbe familiar with. Which is our NonExerciseActivity Thermogenesis. So this is when your sittingat your table and you feel like you're doing nothingand not igniting any calories. In fact, we are burning caloriesduring that because we have to have muscles firingto keep us upright and not in a pile on the flooring. So all of these sections gointo the calculation of total vigour payment. And then how do wecalculate the physical activity pieceof this. This is can be prettycontroversial calculation I believe because as alwayswhen people pay us counts, they motley from root to source.But in general we will takeour basal metabolic proportion and multiply itby a certain factor dependent on the activity level. So someone who is sedentary willhave a lower point to multiply by than someone who is particularly active. Again you'll see a vastdifference in the actual figures specified. What I recommend is that you geta perspective of what sort of factor it is. So somewhere between 1 and 2. However, we really know thatthere are extreme athletes.People that are ridingcentury journeys. Ultrmarathoners might run5 0 miles in a daylight. They are certainly goingto be above the extremely activelevel. So you might even insure numberstowards 3. So don't go memorizingthe numbers. Precisely sort of get a relative project that physical task is multiplying the basal metabolic proportion by a particular factor ..

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