Avoid these five common weight loss mistakes by Hristo Hristov

Let's use a real world example. Consider a female person with a Resting Metabolic Rate of 1200 calories a day. One day has 1440 minutes. Our example lady is burning 1200/1440 = 0.84 calories per minute at rest, which signifies a MET = 1. Let's say our example woman just returned from an aerobics class, where she exercised for 30 minutes. General aerobic class training has a MET = 6. Our example lady has just burned 30 (minutes) x 6 (MET) * 0.84 (calories per minute) = 151 calories while exercising. Suppose our lady would have chatted on the internet instead of exercising (MET = 1.5). In this example, the woman substituted chatting on the internet with aerobic exercising. Remember, that every time you do something you substitute one activity for another. In order to get the extra calories, we have to subtract 1.5 (chatting) from 6 (exercising). Now let's calculate the extra calories: 30 (minutes) * (6 - 1.5) (MET value) * 0.84 = 113 calories.

Let's consider what a standard calorie counter would have done. First, it will assume an average calorie burn rate of 1 calorie per minute. Then the counter will find that exercising for 30 minutes will yield 30 (minutes) * 6 (MET) * 1 (calories per minute) = 180 calories. The calorie counter will add these 180 calories to your daily expenditure without considering that a part of these 180 calories is already accounted by your usual activities.

Do you now see the difference between 113 calories and 180 calories? If that woman spends 5 hours a week in that aerobics class, the standard calorie counters will overreport her calorie output by: (180-113) * 10 = 670 calories a week. The woman will be fooled that her metabolic rate has dropped while she just overestimated her calorie expenditure. Enter weight loss plateau, wasted time and efforts. Do you have the time for trial and error calorie estimations?

Remember these two rules:

• Report only extra activities to your calorie counter. If your walk to your office every day, do not log "walking to office for 30 minutes" as an extra activity. Consider only unusual activities that contribute to extra expended calories!
• Always subtract the calories you would have burned instead of exercising. A general rule is to subtract from 1.2 to 1.5 from the MET values. In some cases, you need to subtract a greater MET. If you substitute 30 minutes of bodybuilding (MET = 6) for 30 minutes of slow jump rope (MET = 8) then the additional MET would be 8 - 6 = 2.

How to find the MET values of activities based on standard tables?

In order to make the above calculations, you need to know the MET values of activities. Standard tables give: name of activity, duration and calories. Standard tables assume an average calorie expenditure of one calorie per minute. To find the MET you just need to divide the calories by the duration.

Example: "Bicycling, stationary, general", "20 minutes", "140 calories"

MET of "Bicycling, stationary, general" = 140 / 20 = 7

I know these calculations are somewhat tedious and in many cases the standard calorie calculations are close to correct. However, in some cases they can significantly over or under-calculate the calorie expenditure of activities and compromise your weight loss plan with daily miscalculations.

Mistake #3: Training with light weights and lots of reps

I have seen countless number of ladies come to the gym, get the lightest possible dumbbells, crank out some hundreds of reps and go home. Most often, these women do not get the results they want. The problem with this type of training is that it does not burn many "extra" calories unless you spend a considerable amount of time in the gym. Hefting Ken and Barbie weights in the gym has a MET value of 3, which means that it burns 3 times more calories than resting in bed. Almost anything you do during the day has a MET value of 1.2 to 2. Browsing the internet on your computer has a MET value of 1.5. Realize that almost anything you do during the day (average MET = 1.5) has about 50% overlap in calorie expenditure with training with very light weights (MET = 3). If you pump super light dumbbells in the gym, only about half of the calories burned are "additional".

Of course, you can burn a considerable amount of extra calories training with light weights but you have to really extend the duration of this type of training. Curling 5 pound dumbbells for 4 sets of 20 reps and chit-chatting for 20 minutes in the gym is not going to burn many extra calories.

Remember the rule: the less intensive the activity (smaller MET), the greater the calorie expenditure overlap with casual activities; the less intensive the activity, the more time you have to spend doing it to expend a good deal of extra calories. Always subtract a MET of 1 to 1.5 to arrive at the additional expended calories.

Mistake #4: Using "average person" calorie estimations

You can find all kinds of tables showing the calorie cost of different physical activities on the internet. These tables don't show your calorie expenditure. They actually tell you the calorie expenditure of an "average person". These tables assume you are an average person that burns one calorie per minute at rest. Yes, we covered this in the first part of the article and it needs repeating. Most men burn more than one calorie per minute and most smaller women burn less than one calorie per minute at rest. In reality, these standard tables overestimate the calorie expenditure of smaller people and underestimate the calorie expenditure of bigger than average people. Combine this with the common mistake of counting all burned calories as "additional calories" and you have a wide range of possible miscalculations.

Mistake #5: Going on very low calorie diets (VLCD)

Research has shown little to no difference in the weight loss rate of 1200 calorie diets and 800 calorie diets. The 1200 calorie threshold is the point where further calorie restriction does not yield faster results. Diets in the range of 800 to 1200 calories a day suppress the resting metabolic rate from the very first day and after some weeks on these diets, the metabolic rate has dropped by up to 20%. This metabolic drop is just a consequence of the calorie restriction factor; other factors such as the level of leanness may further depress the calorie expenditure.

A big percentage of the quick initial weight loss on a VLCD is water. VLCDs create an illusion of fast fat loss, while in reality most of the weight loss is water. It is hard to continue a very low calorie diet for a prolonged time because the harsh calorie restriction makes you hungrier than ever. People on VLCDs often lack energy and move very little. When you stop the diet, you are prone to instant overeating. Eating a very low calorie diet is the ticket to yo-yo dieting.

Instead of using very low calorie diets, I recommend diets with a mild calorie restriction and an emphasis on exercise. Overweight people who know what they are doing can employ VLCDs for a limited time. It is important to get enough vitamins and minerals from supplements, because such low calorie diets are woefully inadequate in nutrients. Water intake should be high.

Bodybuilders, powerlifters and athletes must stay away from very low calorie diets because the large calorie restriction causes a greater proportion of the weight loss to be muscle loss.

If you want to automate these complicated calorie calculations, try our training and nutrition software Fitness Assistant FREE for 30 days.

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BIO:

Hristo Hristov owns X3MSoftware, a company specializing in developing diet and fitness tracking software. Hristo has a degree in Computer Science and passion for strength training. Hristo has designed and written Fitness Assistant, X3MSoftware's leading software product. Download your demo at http://www.x3msoftware.com

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