One potential cause for my fatigue and lack of energy my trainer is exploring is whether or not I’m eating enough. I realize this is somewhat contrary to yesterday’s post about giving up foods and empty calories such as beer, but you can in fact make the mistake of not eating enough when you diet.
Calories, whether they come from protein, carbs or fat, are all fuel for the body and work in different ways. Your body automatically burns so many calories a day just by being alive. Everyone has a resting calorie burn rate, aka resting metabolic rate (RMR). I burn about 2,200 calories a day without doing anything, based on my gender, age, weight and height. That means if I want to maintain that weight, I want eat that same amount of calories.
When you cut calories to below your RMR, your body fights back. It actually decreases your metabolic rate. If you are eating an insufficient amount of food to meet your RMR, you will not be eating enough to maintain your body’s functions properly. You can get away with this for a day or two, but while repeatedly restricting your calories below your RMR is not unusual among dieters, it can have a negative impact on your health.
If your restriction of calories is too severe, your body will do everything it can to conserve calories and at the very least, you won’t lose weight if you’re working out three days a week intensely, as I am. Other symptoms of going below your RMR are fatigure and listlessness. My trainer and I haven’t confirmed this, but when I look at my Weight Watchers plan, it’s essentially saying allowable daily caloric intake is 1,950. That’s already a 200 calorie deficit, plus what I burn in exercise at the gym as well as anything else I do such as brisk walks home from work, although exercise does become earned points, e.g. caloric intake.
The recommended deficit is about 500 calories a day if you want to safely shave off the pounds, and that assumes I eating healthly. If you try shave off 750 calories a day and put crap such as diet soda and frozen dinners in your system, you’re not going to feel great and probably will end up being unable to maintain any kind of exercise regime at the gym. The quality of calories is important – it’s a mix of protein, carbs and fat. Cutting carbs out completely is not the answer and neither is cutting out all fat. There are some carbs and some fats your bodies needs. They all work together (a whole other post).
There is no magic pixie dust, but a few rules of thumb for making sure you can get the right mix of calories into your system to maintain your RMR and healthly create the proper deficit for weight loss:
- Plenty of veggies, especially dark, leafy greens and other highly colored vegetables each day
- Aim for whole grain breads, pasta, cereals and other products in very small portions
- Aim for 2 or 3 servings of fruit each day
- For protein, choose fish, poultry, eggs, lean meats, beans, and legumes
- Avoid packaged, processed foods, even those aimed the weight-conscious; they may be low in calories but often offer little nutrition
Remember that even before you start vigorous exercise, you are already burning calories beyond your RMR through daily activities – doing four loads of laundry that you have to haul down to the laundry room counts as does rearranging furniture or working on your feet all day as a pharmacist.
What I have to figure for myself is what my real deficit is, whether it is healthy and making sure I have a correct mix of fuel.
Ultimately, if you limit fuel to extreme, you will sputter and conk out like any car.