Caloric Restriction in Keratoconus
Caloric restriction
Caloric restriction has been proved in laboratory studies as the only way of extending the lifespan of rats[1], in other words, those that eat all they want to die faster than those who have a restrictive diet. This means that eating too much food is bad for you, of course, we are not rats; but remember that digestion requires that you spend energy (enzymes) processing the food you eat.
What to do
You can reduce the calories you consume or you can fast certainly calorie reduction can help to reduce the oxidative damage from free radicals and improve the enzymatic protection your cells have.
However, do you know your caloric requirements? First, It is easy to calculate your caloric requirements, you just need to know five things, your age (years), sex (male, female), height (centimeters), weight (kilograms), and your approximate activity level.
Caloric restriction formulas
The next formula is called the Harris-Benedict formula for the scientists that created it. In conclusion, by calculating your basal metabolic rest rate you will know how much energy your body requires daily. Multiply this for your activity level and finally, you will know how many calories your body needs to maintain your weight.
Harris-Benedict formulas
BMR=basal metabolic rate
For Men
BMR=66.4730+(13.7516*weight)+(5.0033*height)-(6.7550*age)
For Woman
BMR=655.0955+(9.5634*weight)+(1.8496*height)-(4.6756*age)
Now multiply this BMR for the activity chart level number below according to with your exercise level to get your daily metabolic expenditure in kilocalories.
| Exercise | Daily Caloric Expenditure |
|---|---|
| Little or no exercise | DCE=BMRx1.2 |
| Light exercise (1 days a week) | DCE=BMRx1.375 |
| Moderate exercise (3 days a week) | DCE=BMRx1.55 |
| Strong exercise (6-7 days a week) | DCE=BMRx1.725 |
| Very strong exercise | : DCE=BMRx1.9 |
Most importantly, men need more calories than a woman, even a reduction of 500 calories is enough to have a calorie reduction that can benefit your health.
Bibliography:
[1] Effect of Restricted Feeding Upon
Aging and Chronic Diseases in
Rats and Dogs*
C. M. McCay, PH.D.
American Journal of public health Vol 37 May 1947. P521-528.
Harris-Benedict Calculator
Conclusion
The number you get is the number of calories that your body spends every 24 hours according to your level of activity. This formula can give you a rough estimate of how many calories you need to reduce from your diet to start losing some weight.
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