BMI has as its main advantage the ability to be used in large scale population studies. It requires only two measures; height and weight, which can both be measured accurately by a person with minimal training. It suffers similar deficiencies to weight in that it is less valid in those with a mesomorphic build, and particularly athletic men. The validity of BMI, although higher than weight, is lower than is necessary for a good measure of body fatness. Validity has also been found to be higher in women than men and to be significantly influenced by body build.

Comparisons with other anthropometric measures, at least in large populations, show the usefulness of BMI measures. Its reliability is relatively high, but as with weight, this can be influenced by fluid content. Sensitivity could be expected to be similar to that for weight as height is not expected to change significantly, except with age. The BMI therefore is useful for large scale population studies and, in combination with other measures, is useful for individuals. Some researchers have called for the total abandonment of BMI. However, according to Lohman. ‘. . . BMI needs to be included with skinfolds or bioelectric impedence and other laboratory body composition measures of muscle, bone, and fat’.

The limitations of BMI, as with weight, need to be understood in working with individuals, i.e. there is a need to apply other assessments (including a practised ‘calibrated eyeball technique’) to raw BMI data.

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Normally, the 32-year-old Niskayuna, New York, resident maintained good eating and exercise habits. She limited junk food, made sure she ate lots of fruits and vegetables, and worked out regularly. Even when’ her last pregnancy left her with 20 pounds of “baby fat,” she was able to take off the weight within a year, thanks to her healthy lifestyle.

Still, Shereen couldn’t seem to get through the holidays without picking up a few unwanted pounds. Every year was the same: At holiday soirees, in the presence of savory appetizers, tempting high-fat desserts, and sparkling champagne, Shereen would feel her willpower wane. By the time the New Year arrived, Shereen found herself toting around some of weight she had once worked so hard to lose.

Shereen was able to take off the extra pounds, but she hated having to do it year after year. As yet another holiday season approached, she knew she had to find a way to stop herself from overindulging. Then it hit her: Since she was most likely to eat too much when her stomach was empty, she’d make sure that her stomach was full before she started celebrating.

Shereen got into the habit of eating a pre-party plate of ro-maine lettuce or green leaf lettuce topped with carrots, cucumbers, and a splash of balsamic vinegar. She would leave her home with her tummy politely full. Once at the party, instead of lingering by the buffet table, she’d mingle with other guests. She’d sample a treat or two, but she didn’t feel the urge to overindulge, as she had before.

Shereen’s strategy worked like a charm. She survived that holiday season and seasons afterward without gaining a pound. Now that’s a cause for celebration!

WINNING ACTION

Start social celebrations with a private mini-meal. Before heading to a party, help yourself to a snack to take the edge off your hunger. I like to grab a V8 before party time. It’s easy, it’s quick, and I pick it up at a convenience store on the way. Other good choices include a piece of fruit, yogurt, or even a small plate of pasta.

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