What does Calorie Restriction mean?

I believe it means that you are restricted to eating a limited amount of calories per day.

Limiting your calorie intake...so if you're "restricted" to 1200 calories a day, that's what your goal would be to eat daily. Along with the calorie restriction you may also have restrictions on the amount of fat and carbs you can have that contribute to the calorie restriction.

What does Calorie Restriction mean?

To lose fat you need to create a calorie deficit. You best accomplish that through calorie restriction (limiting number of calories) and exercise. For example... My heartrate monitor indicates I burned 500 calories during spin class. My established estimated basal metabolic rate through just existing plus normal daily activities is 2000 calories. I want to restrict 500-750 calories a day for steady fat loss so I restrict my calorie intake to between 1750 and 2000 calories for the day to achieve that deficit. Calculating your basal metabolic rate accurately and also accurately calculating how many calories your burning during exercise are entirely another extensive topic. Many people make the mistake of trying to achieve their calorie deficit from the intake side alone. There is no replacement for sufficient exercise. Extended periods of very low calorie intake will crash your metabolism and your body will adjust your basal metabolic rate to it.

Brad