By Mark Rullo MS, CSCS, MES
In the previous article, “UNDER-standing Weight Loss Frustration” I discussed how it is easy to UNDER-report the calories you are consuming and give up in frustration. The purpose of that article was to reinforce the science that weight loss is simple, in that it revolves around calories in versus calories out. However, simple doesn’t mean easy, due to factors such as portion distortion, food label loop holes, accountability accuracy of nutritional labels, and Bites Licks and Taste’s that may cause you to miscalculate and UNDER-report the calories you are consuming.
This article is going to continue on that theme but now focus on the other side of the caloric equation: caloric expenditure (calories out).
We have been able to document with our clients here at My Fitness Kitchen that the UNDER-reporting of caloric input (eating) averages around 25-30% until they hone in on the factors leading to this error. Meaning if you report a 1500 calorie intake, in reality you could be eating 1875-1950 actual total calories. This equates to a daily calorie error of 350 to 450 from your daily deficit, or .7lb to .9lb per week you would be expecting to see on the scale but are not – VERY FRUSTRATING.
Now what about our caloric expenditure or “burn”?
First and foremost, let’s accept the fact that all methods used to measure caloric expenditure—such as the Exerspy™ armband (used here at the Kitchen), heart rate monitors, Fit Bits, Fuelbands, and displays on stationary cardio machines, to name a few—are only estimates. With that said, if you want to minimize frustration, choose a method that does not exaggerate your burn. It may be cool to see a large caloric burn from a device; but if it isn’t true, that is a cruel trip back to reality when you jump on the lie-detector, also known as the scale.
To document such a wide range of OVER-estimating caloric expenditure, I wore an Exerspy™ armband while doing a simple 30 minute steady-state cardio workout on an elliptical at a moderate level of intensity (level 14).
In the photo above, the exercise display on the machine reported 404 calories expended; whereas the Exerspy™ arm-band shows 192 calories burned in the 30 minutes of steady-state work. That is a 212 calorie difference in 30 minutes of work or 7.1 calories per minute difference! Imagine doing that 30 minute workout three days a week or every day. That is 636 or 1484 calories you believe you are able to eat. Again both are estimates; however it is better to err on the lower end so you don’t think you have more calories to eat than you actually do. It is no different than being told you will earn$404 dollars for doing something but in reality only get paid $192. Even worse is if you went out and purchased (ate) something that cost $404 but actually do not have the additional funds ($212) to cover the cost.
Another example happened when I was taking a Spinning class. A female next to me, no where near my size and weight (at least 60-70 lbs lighter), wore a heart rate monitor that reported she burned over 800 calories during the workout, whereas my armband showed only 380 calories burned. To understand this, the point is that mass (particularly muscle mass) plays a significant role on caloric expenditure; therefore even if I was dogging it and she was busting her butt, there’s no way there would be over a 400 calorie difference.
Another problem with calculating caloric burn of workouts is that it fails to account for the other 23 hours in the day (assuming the workout was for 60 minutes). This is where many info-commercials mislead people with hype of extreme caloric burns that are mostly impossible. Workouts with a 1000+ calorie burn are not happening unless we are talking about a large (300+ lbs.) individual who is extremely fit, exercising at a high intensity for 60 minutes.
By wearing an armband for 24 hours, I can see what the difference in one’s expenditure is while sleeping, sedentary, active (vertical/walking around), and exercising. For example, on average I burn about 4,000 calories per day. Typically I burn about 100 calories per hour sleeping, about 190 calories per hour being sedentary, and anywhere from 300 to 550 calories per hour during a workout depending on the intensity and type. Therefore to illustrate, if I would…
• …sleep 8 hours, that would be about 800 (8×100) calories
• …be sedentary for 15 hours that would be about 2850 (15×190) calories
• …and exercise an hour and average 425 calories burned for the workout
This example would total about 4,075 calories in 24 hours. The important take-away from this is that we burn calories 24 hours, not only when we exercise.
Yes, having knowledge of an individual workout burn is great and can be motivating, but it can be misleading, particularly for the devices that OVER-estimate the caloric expenditure. Equally troubling with individual workout caloric expenditure (even when the device doesn’t OVER-estimate) is that it fails to show the entire picture of weight loss. Regardless of what you burn in a workout, how will that help you determine what you can eat (in calories) if you do not know the other 23 hours or the complete total for the day?
Understanding that we burn calories all day can also explain and educate how we can influence our metabolism during rest, not just by exercising. Monitoring expenditure all day can show which workouts create the greatest EPOC (Excess Post Oxygen Consumption), which is a scientific term for “after burn” or elevated metabolism post workout.
As in the previous article “UNDER-standing Weight Loss Frustration” and in the few examples above on how people “OVER-expect weight Loss Success” is how we help individuals here at My Fitness Kitchen via technology and evidence-based science to eliminate the guesswork with weight loss and build programs around YOUR FOOD, on YOUR TERMS, for YOUR RESULTS.
For more information, please feel free to consult with any of the fitness professionals at My Fitness Kitchen®. Additionally, as an on-going thank you to Laurel Mountain Post and its readers, mention this article for a FREE, no obligation, personalized, metabolic nutritional formula and fitness program that will leverage the “Hierarchy of Fat Loss.” If you are serious about achieving a body transformation goal, then you need a program; as any goal without a plan is really only a wish!
As an added incentive for people new to My Fitness Kitchen®, by mentioning this Laurel Mountain Post article and after meeting with one of My Fitness Kitchen’s Fitness Professionals for a private consult as offered above, you will receive $50 “Kitchen Cash” to be used toward any program or service at My Fitness Kitchen®, as a courtesy of the Laurel Mountain Post.