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How To Calculate How Much Less You Need To Eat Now That You Are Exercising Less

2/4/2020

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Four tips to bring you out of stay-at-home healthier

My stay-at-home exercise level is significantly less than when I was going to the gym three times a week. My weight is starting to creep up.

Here's how much less we need to eat, based upon our reduced level of #StayAtHome activity.

​I'm still exercising, but a lot less intensively than before stay-at-home. I was doing three intense gym visits and running 5km twice a week. 

Now I run more often, but don't have the gear and space to put in the maximum intensity I was doing at the gym.

You now need 20% fewer calories

Let's get straight into it - what is the difference in calories burned each day if you move from being very active, to doing little physical activity at home?

If (1) you were going to the gym say four times a week, or you had a physically demanding job, and (2) now you are at home doing little exercise, then you need fewer calories.

The difference between the two is 750 calories per day for a woman and 1000 calories per day for a man. 

If you were going to the gym three times a week and you are now doing little physical activity at home then women need 500 calories per day less, and men 600 calories per day less.

Those are BIG differences in energy intake. Let's call it an average of 20% less which you need day-to-day.
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50 year old male 85kg 185cm | https://tdeecalculator.net/
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50 year old female 65kg 165cm | https://tdeecalculator.net/

3 month stay-at-home equals 6.5kg extra weight

Think about what happens if you do not reduce your energy intake. I've noticed my weight creep up a kilogram or two.

The 20% of the energy that you are now consuming that is not being used for exercise will translate into about 0.5kg of extra weight per week. That's "weight" as in fat. It goes straight to fat stores as it has nowhere else to go.

If we are shut down for 3 months with coronavirus that is 13 weeks - 13 * 0.5kg equals 6.5kg. That's an unhealthy addition to our weight.

Optimistically, you might think to yourself that you can get it off when we get through this period. The usual formula is by reducing your energy intake by 500 calories a day you can lose 0.5kg per week. 

It's not that easy. You have no doubt noticed that it is easier to put weight on than take it off.

There is a widely used rule of thumb that if you "reduce your energy intake by 500 calories a day you will lose a pound a week". That's not true because it does not take into account the metabolic response of the body. Our body will hang on to what it has stored.

On the other hand, consuming an extra 500 calories will easily add the weight - because the body is efficient at building its energy reserves.

This means that you do not want to be eating more than you need now.



​How do you know how much to reduce?

To know how much to reduce you need to compare your activity levels before stay-at-home and now. Here are the levels:
  • Sedentary (Index 100) little or no exercise, desk job
  • Lightly active (Index 115) light exercise/ sports 1-3 days/week
  • Moderately active (Index 130) moderate exercise/ sports 6-7 days/week
  • Very active (Index 144) hard exercise every day, or exercising two xs/day)
  • Extra active (Index 160) hard exercise 2 or more times per day, or training for a marathon, or triathlon, etc.

You then need to know your daily energy consumption before the stay-at-home regime came into place. There are many such calculators, this one is very useful.

I am using these two examples:
  • A 50-year-old woman weighing 65kg and requiring 2206 calories per day, and
  • A 50-year-old male weighing 85kg and requiring 2708 calories per day.

To get a precise number, you use the Indices associated with your past level of activity and your new level of activity. 

For example, if you were very active (Index 144) and are now lightly active (Index 115) you are using ((144 - 115)/144) = 20% less energy. For our 65kg woman example, that means 20% X 2206 calories = 440 calories per day.

OR, use this rule-of-thumb, which is accurate enough for our purposes. Multiply your weight in kg by:
  • 25 if you are sedentary
  • 29 if you are lightly active
  • 33 if you are moderately active,
  • 37 if you are very active, and
  • 41 if you are extra active.

​This gives you your energy requirement for each level of activity.
For the example of the 65g woman, the difference between very active (65 * 37) and lightly active (65*29) is 520 calories.
I am using 500 calories as an approximation to what most people will need to reduce.

What will you cut down?

My suggestions are for those over 50. 

The way you go about this is not to set it up as a diet. You want a sustainable new everyday food plan. You don't want to start counting calories or radically changing your diet, and then tire of it.

This change should be:
  1. Sustainable
  2. Non-technical
  3. Healthier
  4. Easy to start immediately.

Remember, the target is to reduce the daily intake by 500 calories. So what do 500 calories look like? Here is a list of common food items which are about 500 calories. They represent the calorie load that we want to cut out of our daily intake.

Tip # 1: Reduce your portion sizes

The most sustainable and perhaps the simplest thing to do is to reduce your portion sizes by 20% (the 500 calories represented about 20% of calories we consumed before stay-at-home).

Even better, maintain the protein portions reduce the low-value foods, the saturated fat, and the carbs by more than 20%. Don't cut your vegetables nor the variety of vegetables.
Tip # 2 Maintain or increase protein

I suggest that you do not cut down on your protein intake. About 30% of the energy in protein is used in metabolising it (this is called diet-induced energy expenditure). This takes time as the protein moves through the digestive system, and it keeps you from feeling hungry.


In fact, if you can, you should probably increase your protein as you are probably not eating enough protein. Try to eat about 1.2g of protein per kg of body weight daily, e.g. if you weigh 70kg aim for 140g of protein. 

One reason for this is because as we age, we metabolise protein less efficiently. 

If you do increase your protein intake, then you need to reduce calories from your other macronutrients - carbs and fats.

Over 50? You’re Not Eating Enough Protein
Here’s Why, and How Much

Fats ain't fats - there are good and bad

Tip # 3 Increase good fats

It sounds counterintuitive, but increasing healthy fats is a sound strategy. Fats is as essential to our diet as protein and carbohydrates, and healthy fats lead to better health. For example, some vitamins require fat to dissolve into the bloodstream and provide nutrients.

Reduce as much as possible your trans-fats. Trans-fats are in foods that contain partially hydrogenated vegetable oils. These are the worst fats for you. You might find trans fat in:
  • fried foods (French fries, doughnuts, deep-fried fast foods)
  • margarine (stick and tub)
  • vegetable shortening
  • baked goods (cookies, cakes, pastries)
  • processed snack foods (crackers, microwave popcorn).

Limit your saturated fat sources such as:
  • fatty cuts of beef, pork, and lamb
  • dark chicken meat and poultry skin
  • high-fat dairy foods (whole milk, butter, cheese, sour cream, ice cream)
  • tropical oils (coconut oil, palm oil, cocoa butter).

Add monounsaturated fats. This type of helpful fat is present in a variety of foods and oils. Research has consistently shown that eating foods that contain monounsaturated fat can improve your blood cholesterol level and decrease your risk of cardiovascular disease. These foods include:
  • nuts (almonds, cashews, peanuts, pecans)
  • vegetable oils (olive oil, peanut oil)
  • peanut butter and almond butter
  • avocado.

And add more polyunsaturated fats which contain Omega-3. Omega-3s appear to not only decrease the risk of coronary artery disease but also help lower blood pressure levels and guard against irregular heartbeats. The following types of fatty fish contain omega-3 fatty acids:
  • salmon
  • herring
  • sardines
  • trout.

By substituting lean cuts of meat for fatty ones, avoiding high-fat packaged foods and snacks, and refraining from fat-rich products such as butter and partially hydrogenated fats, you can cut out dozens or even hundreds of calories per day.

On the other hand, many people mistakenly think that cutting fat always means cutting calories. Some fat-free foods contain more calories than the regular versions because manufacturers use extra sugar to make up for the flavour lost in removing the fat. Moreover, low-fat or nonfat foods are not low-calorie if you consume them in large quantities.

  • Experiment by trial and error to adjust your daily fat intake.
  • Replace the trans-fat and saturated fat foods with equal size servings of foods with monosaturated and polyunsaturated fats.

Remember this - calories are not bad. The wrong food is bad - and especially that with nutritionally harmful calories. Healthy fats are healthy, but don't overdo it as eating too many calories is not healthy.
Tip #4 Stop eating "empty calorie" carbs

Make a solid effort to take these empty calorie foods out of your regular eating: 
  • Treats like packaged cakes, cookies, and doughnuts contain both added sugars and solid fats.
  • Beverages like soda, sports and energy drinks and fruit drinks contain added sugars.
  • Meats like sausage, hot dogs, bacon, and ribs contain solid fat.
  • Fast food — like pizza, burgers, french fries, milkshakes, etc. — often contains both added sugars and solid fats.
  • Hard candy and candy bars may contain both added sugars and solid fats.

Cutting down on these types of food is hard, so try these three hacks:
  • Don't shop when hungry
  • Put those you have away - out of sight and hard to reach
  • Reach for nuts and other healthier alternatives (below) and make these more visible and easier to reach, such as nuts and fresh fruit.
Summary
  • Try to reduce your energy intake by 500 calories if you have become much more inactive since having to stay-at-home. 
  • Reduce your serving sizes by 20%, even buy smaller plates so that they look full.
  • Add more protein as it will keep you feeling satisfied for longer.
  • Cut out unhealthy fats and add in healthy fat in their place;
  • Cut down as much as possible on foods which are low in nutritional value and high in calories.​
  • Adjust as you go, to see what works for you as a sustainable new way of eating, while keeping you trim for the next few months.

Get this right, and make it part of your everyday living, and you can look forward to maintaining a healthy weight for the duration.

Now, I'm off to have a few nuts.


Good luck.
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