Q:

I’ve tried every diet under the sun in my life, and I’m really afraid I’ve ruined my metabolism. I seem to gain weight no matter what I eat now! Is there any way to fix this?

A:

This is such a good question — I’m so glad you asked! Many people suffer from the backlash that can result from years of yo-yo diets. What happens is this: When people let their calorie levels drop too low, their body’s survival mechanism kicks in, lowering their metabolic set point (or basal metabolic rate). When they go off that crash diet and begin to eat normally again, they gain back any weight lost — plus. And what follows that? Yup, another crash diet.

The cycle is often very frustrating, but it CAN be reversed with time, consistency, and patience. What you’ll need to do is the exact opposite of what we call shocking the metabolism; you have to allow your body time to adapt to a new metabolic set point — by being consistent, you’ll force your body to adapt.

Okay, here’s the game plan: First, set your daily caloric intake at 12 calories per pound of body weight. (For example, my weight is 117; 117 x 12 = 1,404 calories a day.) Then stick like glue to that calorie allowance for at least one to two months, depending on your metabolism. This will allow your body time to readjust your metabolic set point accordingly.

Now, here’s the other part of the equation: The absolute best way to pump up your metabolism is to EXERCISE. You’ll be burning calories not only during your workout but also up to 48 hours after — all the while increasing lean muscle tissue, which speeds the metabolism over the long term. Aim for five hours of exercise a week if possible, but no fewer than three hours a week.

From Ask Jillian *

Q:

I’ve tried every diet under the sun in my life, and I’m really afraid I’ve ruined my metabolism. I seem to gain weight no matter what I eat now! Is there any way to fix this?

A:

This is such a good question — I’m so glad you asked! Many people suffer from the backlash that can result from years of yo-yo diets. What happens is this: When people let their calorie levels drop too low, their body’s survival mechanism kicks in, lowering their metabolic set point (or basal metabolic rate). When they go off that crash diet and begin to eat normally again, they gain back any weight lost — plus. And what follows that? Yup, another crash diet.

The cycle is often very frustrating, but it CAN be reversed with time, consistency, and patience. What you’ll need to do is the exact opposite of what we call shocking the metabolism; you have to allow your body time to adapt to a new metabolic set point — by being consistent, you’ll force your body to adapt.

Okay, here’s the game plan: First, set your daily caloric intake at 12 calories per pound of body weight. (For example, my weight is 117; 117 x 12 = 1,404 calories a day.) Then stick like glue to that calorie allowance for at least one to two months, depending on your metabolism. This will allow your body time to readjust your metabolic set point accordingly.

Now, here’s the other part of the equation: The absolute best way to pump up your metabolism is to EXERCISE. You’ll be burning calories not only during your workout but also up to 48 hours after — all the while increasing lean muscle tissue, which speeds the metabolism over the long term. Aim for five hours of exercise a week if possible, but no fewer than three hours a week.

From Ask Jillian *

I haven’t gone soft on the importance of exercise or watching calories, but what I’ve discovered over the years is that a healthy metabolism (and essentially, healthy hormones!) is the key to changing your life — much more than just getting skinny. I’m talking about adding years of quality to your life.

We all know that fad diets are a thing of the past (or at least I hope we do!). The no-carb, no-fat crazes of the eighties and nineties are scientific laughingstocks and pop-culture dinosaurs. Now that you’re living in the present, I want to let you in on the secret that will keep your body healthy and hot naturally: hormones.

So what do hormones have to do with anything? If I were to ask you what your metabolism is, would you say, “It’s the way my body burns calories”? If so, you’re wrong! That’s what your metabolism does, not what it is.

The correct answer is, your metabolism is your biochemistry. And that biochemistry is run by means of the chemical messengers known as hormones. Hormones tell you that you’re hungry, full, when to eat, and what to do with your food (whether to burn it or store it). And when you exercise, hormones tell your body how to move and consume energy stores. Hormones control almost every aspect of how we gain weight — and how we can lose it.

The scary part is that your hormones — and by definition, your metabolism — are being set up to fail. Without your even knowing it, your hormones have been hijacked by toxin-filled, nutritionally deficient, stress-dominated foods — endocrine disruptors — that cause obesity and disease. It’s time to target and eliminate these endocrine disruptors and replace them with the hormone-positive foods that make you healthy, happy, and skinny, no matter how old you are.

From Jillian *

I haven’t gone soft on the importance of exercise or watching calories, but what I’ve discovered over the years is that a healthy metabolism (and essentially, healthy hormones!) is the key to changing your life — much more than just getting skinny. I’m talking about adding years of quality to your life.

We all know that fad diets are a thing of the past (or at least I hope we do!). The no-carb, no-fat crazes of the eighties and nineties are scientific laughingstocks and pop-culture dinosaurs. Now that you’re living in the present, I want to let you in on the secret that will keep your body healthy and hot naturally: hormones.

So what do hormones have to do with anything? If I were to ask you what your metabolism is, would you say, “It’s the way my body burns calories”? If so, you’re wrong! That’s what your metabolism does, not what it is.

The correct answer is, your metabolism is your biochemistry. And that biochemistry is run by means of the chemical messengers known as hormones. Hormones tell you that you’re hungry, full, when to eat, and what to do with your food (whether to burn it or store it). And when you exercise, hormones tell your body how to move and consume energy stores. Hormones control almost every aspect of how we gain weight — and how we can lose it.

The scary part is that your hormones — and by definition, your metabolism — are being set up to fail. Without your even knowing it, your hormones have been hijacked by toxin-filled, nutritionally deficient, stress-dominated foods — endocrine disruptors — that cause obesity and disease. It’s time to target and eliminate these endocrine disruptors and replace them with the hormone-positive foods that make you healthy, happy, and skinny, no matter how old you are.

From Jillian *

The number of calories you burn in a day is known as your active metabolic rate (AMR). Rates vary from person to person, so it is cruical that you take the time to figure yours out — if you don’t, you run the risk of consuming too many calories or even consuming too few.

A part of determining how many calories you burn in a day, you need to know is your physical activity level. Determine which one of these descriptions best fits your day-to-day routine, then give yourself the appropriate score.

a. Sedentary Physical Activity Level
Do you have a desk job or do some other kind of work that keeps you in your chair for most of the day? If the answer is yes, your score is 1.1.

b. Light Physical Activity Level
Are you on your feet and walking around for at least half the day? Stay-at-home moms, salespeople, and doctors fall into this category. If this is you, your score is 1.2.

c. Moderate Physical Activity Level
If you’re on the move pretty much all day, with a few limited periods of being sedentary, this is the level for you. People in this category include gardeners, carpenters, and mail carriers. If you’re in this category, your score is 1.3.

d. High Physical Activity Level
Does your job require being constantly on the move, and does it entail significant amounts of manual labor? Construction workers, farm workers, and movers are among those who land in this category. If you’re in this group, your score is 1.4.

If you are a member of my online team and want the Web site to do the math for you, visit my Calorie Calculator.

Otherwise, another element you need to calculate your AMR is the number of calories you burn from exercise on an average day. The number of calories you burn during any exercise session depends on a few things, primarily your body weight.

Use this chart to help you determine the number of calories you burn from exercise on an average day according to your weight, the type of exercise you do, and its duration. You can also use a heart rate monitor to get an accurate number. Write the number down.

Now comes the math. If you don’t know your BMR, it’s influenced by a number of factors, including age, weight, height, gender, environmental temperature, and diet and exercise habits. Because of these varying factors, it’s hard to pin down your BMR to the precise calorie, but we can get pretty close. Here are some formulas for figuring out your BMR. Get out your calculator and plug your numbers into whichever formula applies to you.

MALE: 66 + (6.3 × body weight in pounds) + (12.9 × height in inches) − (6.8 × age in years)

FEMALE: 655 + (4.3 × weight in pounds) + (4.7 × height in inches) − (4.7 × age in years)

Now you have all three numbers: your BMR, daily activity score, and exercise expenditure. Simply multiply your BMR by your daily activity score, and then add your exercise expenditure. Whatever you get from this final calculation is your magic number.