Calorie Control.
I don't think you HAVE to count calories, if you know the types of foods and portions to eat, but it is helpful to
have an idea how many calories are in certain foods. It's difficult
to determine portion sizes of some foods that don't lend themselves well to the palm of your hand/size of your fist
visual measurement (like a glass of milk). Also, many foods are a combination of protein and carbs.
Knowing how many calories you should consume can be very helpful as you're looking at food labels
(you are looking at food labels, right?), or when you're thinking of changing some aspect of your diet.
So, how many calories should you eat?
There are a lot of factors to consider when determine number of calories: Basal Metabolic Rate (BMR),
Daily Caloric Requirements(DCR), body fat %, current weight, male/female. It's all good stuff,
but an easy yet appropriate guideline is the following:
To maintain, eat about 12-13 calories per lb body weight, per day.
If you are extremely active, you may want to even go a little higher.
Multiply by 7 to get your weekly total. To lose about a pound of fat per week, you would
want to create a 3500 calorie deficit for the week by a combination of reducing your weekly calorie total
and burning calories through exercise. And remember, you can't assume reducing your calories even lower will mean
more fat loss. Go for the 1-2 lb loss per week to retain muscle and a healthy metabolism while losing fat.
To gain, slowly increase your calories above maintenance; building muscle takes time. For a better calculation,
check out the 'Game Plan' section in this ISSA article to determine BMR/DCR;
it also includes how to manipulate calories for gaining muscle while losing fat.
Your macro-nutrient ratios
may need to change too based on your goal, and your calories may need to be adjusted based on amount of activity.
So, monitor your progress! For gaining, see the Build Muscle section.
For losing, see the Lose Fat, Maintain Muscle section. I would never go below 1200 calories
per day; this will just slow down your metabolism (mainly through loss of muscle) and make it even more difficult to
lose fat.