Showing posts with label BMI. Show all posts
Showing posts with label BMI. Show all posts

Friday, March 12, 2010

How fit are you? See how you measure up


Ready to start a fitness program? Measure your fitness level with a simple four-part test. Then use the results to set fitness goals and track your progress.

By Mayo Clinic staff

You probably have some idea of how fit you are. But knowing the specifics can help you set fitness goals, monitor your progress and maintain your motivation. Once you know where you're starting from, you can plan where you want to go. And it's easier than you might think! Get started with the simple assessment guidelines below — based on guidelines provided by the President's Challenge, an activity program designed by the President's Council on Physical Fitness and Sports.

Gather your tools

Generally, fitness is assessed in four key areas — aerobic fitness, muscular fitness, flexibility and body composition. To do your assessment, you'll need:

  • A watch that can measure seconds or a stopwatch
  • A cloth measuring tape
  • A yardstick
  • Heavy duty tape
  • Someone to help you with the flexibility test

You'll also need a pencil or pen and paper to record your scores as you complete each part of the assessment. You can record your scores in a notebook or journal, or save them in a spreadsheet or another electronic format.

Check your aerobic fitness: Brisk walk

To assess your aerobic fitness, take a brisk one-mile (1.6-kilometer) walk. You can do the walk anywhere — on a trail or track, inside a shopping mall or on a treadmill. Before and after the walk, check and record your pulse in your notebook or journal.

To check your pulse over your carotid artery, place your index and third fingers on your neck to the side of your windpipe. To check your pulse at your wrist, place two fingers between the bone and the tendon over your radial artery — which is located on the thumb side of your wrist. When you feel your pulse, look at your watch and count the number of beats in 10 seconds. Multiply this number by 6 to get your heart rate per minute.

Let's say you count 15 beats in 10 seconds. Multiply 15 by 6 for a total of 90 beats per minute.

After you've recorded your pulse, note the time on your watch and walk one mile (1.6 kilometers). After you complete the walk, check your watch and record the time it took you to finish — in minutes and seconds — in your notebook or journal. Then check and record your pulse once more.

Measure muscular fitness: Push-ups

Push-ups can help you measure muscular strength. If you're just starting a fitness program, do modified push-ups on your knees. If you're already fit, do classic push-ups. For both types:

  • Lie facedown on the floor with your elbows bent and your palms next to your shoulders.
  • Keeping your back straight, push up with your arms until your arms are extended.
  • Lower your body until your chest touches the floor.
  • Push your body upward, returning to the starting position.

Count each time you return to the starting position as one push-up. Do as many push-ups as you can until you need to stop for rest. Record the number of push-ups you complete in your notebook or journal.

Assess your flexibility: Sit-and-reach test

The sit-and-reach test is a simple way to measure the flexibility of the backs of your legs, your hips and your lower back. Here's how:
  • Place a yardstick on the floor. Secure it by placing a piece of tape across the yardstick at the 15-inch (38-centimeter) mark.
  • Place the soles of your feet even with the mark on the yardstick.
  • Ask a helper to place his or her hands on top of your knees to anchor them.
  • Reach forward as far as you can, holding the position for two seconds.
  • Note the distance you reached.
  • Repeat the test two more times.
  • Record the best of the three reaches.

Estimate your body composition: Waist circumference and body mass index

With a cloth measuring tape, measure your waist circumference at its smallest point — usually at the level of the navel. Record your waist circumference in inches or centimeters in your notebook or journal.

Then determine your body mass index (BMI) — an indicator of your percentage of body fat — through a BMI table or online calculator. If you'd rather do the math yourself, divide your weight in pounds by your height in inches squared and multiply by 703. Or divide your weight in kilograms by your height in meters squared. (To determine your height in meters, divide your height in centimeters by 100). Record your BMI with the rest of your scores in your notebook or journal.

Monitor your progress

Now that you know your fitness level, keep track of your progress. Take the same measurements six weeks after you begin your exercise program and periodically afterward. Each time you repeat your assessment, celebrate your progress — and adjust your fitness goals accordingly. Show the results to your doctor or personal trainer for additional guidance.

Thursday, December 24, 2009

Tips for a Healthy Body Weight

Steps to a Healthy Weight

Achieving and maintaining a healthy body weight is important for good health. Check out this handout for some great tips to lose weight and keep it off (handout is in pdf format).

Body Mass Index Chart

Body mass index (BMI) is one way to tell whether you are at a healthy weight, overweight, or obese. Click here to open a handy chart for adult BMI (it is in pdf format). In the chart, find your height in the left-hand column and move across the row to find your weight. If you are in the overweight or obese range on the chart, you are more likely to have certain health problems.

BMI isn’t right for everyone. Consult your health-care provider about a healthy weight for you, especially if you:

  • Are pregnant or breastfeeding
  • Are very muscular
  • Have lost muscle—for example, if you are an older adult.

A child’s BMI must be compared to growth charts appropriate for that child’s age and gender. Consult a health care provider if you are concerned about your child’s weight.

You can figure your Body Mass Index by using the handy calculator on the website of the CDC: http://www.cdc.gov/nccdphp/dnpa/bmi/. This website allows you to calculate BMI for both adults and children, and gives extra tips for having a healthy body weight.

Wednesday, March 11, 2009

HOW TO DETERMINE YOUR BMI

Your BMI estimates how much you should weigh, based on your height. Here are the steps to calculate it:

  • Multiply your weight in pounds by 703.
  • Divide that answer by your height in inches.
  • Divide that answer by your height in inches again.

For example, a woman who weighs 270 pounds and is 68 inches tall has a BMI of 41.0.

Use the chart below to see what category your BMI falls into, and whether you need to be concerned about your weight.

BMICATEGORY
Below 18.5Underweight
18.5 - 24.9Healthy
25.0 - 29.9Overweight
30.0 - 39.9Obese
Over 40Morbidly obese

BMI is not always an accurate way to determine whether you need to lose weight. Here are some exceptions:

  • Body builders: Because muscle weighs more than fat, people who are unusually muscular may have a high BMI.
  • Elderly: In the elderly it is often better to have a BMI between 25 and 27, rather than under 25. If you are older than 65, for example, a slightly higher BMI may help protect you from osteoporosis.
  • Children: While an alarming number of children are obese, do not use this BMI calculator for evaluating a child. Talk to your pediatrician about the appropriate weight for your child's age.

Doctors use a few different methods to determine whether you are overweight. Your doctor may also take your waist circumference and waist-to-hip ratio into consideration.

In addition, a lot of other factors influence your health. These include:

  • Blood pressure
  • Blood sugar levels
  • Cholesterol levels
  • Diet
  • Physical activity
  • Smoking

Your BMI alone cannot predict your health risk, but most experts say that a BMI greater than 30 (obesity) is unhealthy. No matter what your BMI is, exercise can help reduce your risk of heart disease and diabetes. Remember to always ask your doctor before starting an exercise program.

If doing the math to determine your BMI is d

http://walking.about.com/cs/calories/l/blbmicalc.htm

References

Noel MB, Thompson M, Wadland WC, Holtrop JS. Nutrition and Family Medicine: In: Rakel R, ed. Rakel: Textbook of Family Medicine. 7th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 48.

Skelton J. Overweight and Obesity. In: Kliegman RM, Jenson HP, Stanton BF, eds. Kliegman: Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 44.


If you live in the Bay Area, visit www.ultrafitsf.com to start a path to good health.