The Nutrition Sherpa is your enlightened guide to the healthy world of nutrition. As always the Sherpa is objective and unaffiliated.


Thursday, February 15, 2007

Calories per hour of selected activities

Moderate Physical Activity

Approximate Calories/Hr for a 154 lb Persona

Hiking

370

Light gardening/yard work

330

Dancing

330

Golf (walking and carrying clubs)

330

Bicycling (<10>

290

Walking (3.5 mph)

280

Weight lifting (general light workout)

220

Stretching

180

Vigorous Physical Activity

Approximate Calories/Hr for a 154 lb Persona

Running/jogging (5 mph)

590

Bicycling (>10 mph)

590

Swimming (slow freestyle laps)

510

Aerobics

480

Walking (4.5 mph)

460

Heavy yard work (chopping wood)

440

Weight lifting (vigorous effort)

440

Basketball (vigorous)

440

What can you do to avoid Trans Fats

Here are some practical tips you can use every day to keep your consumption of saturated fat, trans fat, and cholesterol low while consuming a nutritionally adequate diet.

  • Check the Nutrition Facts panel to compare foods because the serving sizes are generally consistent in similar types of foods. Choose foods lower in saturated fat, trans fat, and cholesterol. For saturated fat and cholesterol, use the Quick Guide to %DV: 5%DV or less is low and 20%DV or more is high. (Remember, there is no %DV for trans fat.)

  • Choose Alternative Fats. Replace saturated and trans fats in your diet with mono- and polyunsaturated fats. These fats do not raise LDL (or "bad") cholesterol levels and have health benefits when eaten in moderation.

Sources of monounsaturated fats include olive and canola oils.

Sources of polyunsaturated fats include soybean oil, corn oil, sunflower oil and foods like nuts and fish.

  • Choose vegetable oils (except coconut and palm kernel oils) and soft margarines (liquid, tub, or spray) more often because the amounts of saturated fat, trans fat, and cholesterol are lower than the amounts in solid shortenings, hard margarines, and animal fats, including butter.

  • Consider Fish. Most fish are lower in saturated fat than meat. Some fish, such as mackerel, sardines, and salmon, contain omega-3 fatty acids that are being studied to determine if they offer protection against heart disease.

  • Choose Lean Meats, such as poultry (without skin, not fried), lean beef and pork (trim visible fat, not fried).

  • Ask Before You Order When Eating Out. A good tip to remember is to ask which fats are being used in the preparation of your food when eating or ordering out.

  • Watch Calories. Don't be fooled! Fats are high in calories. All sources of fat contain 9 calories per gram, making fat the most concentrated source of calories. By comparison, carbohydrates and protein have only 4 calories per gram.

  • Here are two actions consumers can take to keep their intake of saturated fat, trans fat, and cholesterol "low":
    • Look at the Nutrition Facts panel when comparing products. Choose foods low in the combined amount of saturated fat and trans fat and low in cholesterol as part of a nutritionally adequate diet.
    • When possible, substitute alternative fats that are higher in mono- and polyunsaturated fats like olive oil, canola oil, soybean oil, sunflower oil and corn oil.

Why Do Some Products Not Declare Trans Fat On Their Labels?

There may be two reasons why you are not seeing trans fat on a product's label.

First, products entering interstate commerce on or after January 1, 2006 must be labeled with trans fat. As this is happening, FDA realizes that it will take some time for food products to move through the distribution chain to a store shelf. Thus, it may take a few months for products that are listing trans fat on their label to show up on a store shelf. However, you will see many products with trans fat listed since companies have already begun to declare trans fat on their products' labels.

Second, FDA has granted enforcement discretion to some firms to use old label stock that do not declare trans fat after the effective date of January 1, 2006. In these cases, food firms followed the required process described in FDA's Guidance for Industry and FDA: Requesting an Extension to Use Existing Label Stock after the Trans Fat Labeling Effective Date of January 1, 2006 (Revised)." For each request, FDA is considering whether the declared label value for trans fat is 0.5 g or less per serving. This information is important because lower amounts of trans fat would have less impact on public health than higher amounts of trans fat. Thus, trans fat information in the Nutrition Facts panel will be missing on some products (that contain lower amounts of trans fat) throughout the next year.

If trans fat is not declared on the label and you are curious about the trans fat content of a product, contact the manufacturer listed on the label.

What Can You Do about Trans Fat

When comparing foods, look at the Nutrition Facts panel, and choose the food with the lower amounts of saturated fat, trans fat, and cholesterol. Health experts recommend that you keep your intake of these nutrients as low as possible while consuming a nutritionally adequate diet. However, these experts recognize that eliminating these three components entirely from your diet is not practical because they are unavoidable in ordinary diets.

Are All Fats the Same?

Simply put: no. Fat is a major source of energy for the body and aids in the absorption of vitamins A, D, E, and K, and carotenoids. Both animal and plant-derived food products contain fat, and when eaten in moderation, fat is important for proper growth, development, and maintenance of good health. As a food ingredient, fat provides taste, consistency, and stability and helps us feel full. In addition, parents should be aware that fats are an especially important source of calories and nutrients for infants and toddlers (up to 2 years of age), who have the highest energy needs per unit of body weight of any age group.

Saturated and trans fats raise LDL (or "bad") cholesterol levels in the blood, thereby increasing the risk of heart disease. Dietary cholesterol also contributes to heart disease. Unsaturated fats, such as monounsaturated and polyunsaturated, do not raise LDL cholesterol and are beneficial when consumed in moderation. Therefore, it is advisable to choose foods low in saturated fat, trans fat, and cholesterol as part of a healthful diet.

Trans Fat What is it?

Unlike other fats, the majority of trans fat is formed when liquid oils are made into solid fats like shortening and hard margarine. However, a small amount of trans fat is found naturally, primarily in some animal-based foods. Essentially, trans fat is made when hydrogen is added to vegetable oil -- a process called hydrogenation. Hydrogenation increases the shelf life and flavor stability of foods containing these fats.

Trans fat, like saturated fat and dietary cholesterol, raises the LDL (or "bad") cholesterol that increases your risk for CHD. On average, Americans consume 4 to 5 times as much saturated fat as trans fat in their diet.

Although saturated fat is the main dietary culprit that raises LDL, trans fat and dietary cholesterol also contribute significantly. Trans fat can often be found in processed foods made with partially hydrogenated vegetable oils such as vegetable shortenings, some margarines (especially margarines that are harder), crackers, candies, cookies, snack foods, fried foods, and baked goods.