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- 02/06/2023

BMI Can’t Tell Us Everything About a Person’s Health

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A recent study conducted by researchers at Concordia University has shed light on the impact of body phenotypes, such as height, behavior, and appearance, on overall health. The study found that regardless of the muscle mass, individuals with high levels of fat mass have poorer health outcomes. The research was published in the journal Preventive Medicine and used data collected from the US population between 1999 and 2006 using dual energy X-ray absorptiometry (DEXA).

The participants were categorized into four phenotypes based on their levels of adiposity and muscle mass, and the researchers investigated the relationship between these phenotypes and various cardiometabolic outcomes, such as lipid levels, blood sugar glucose, and blood pressure. The results were adjusted for factors such as age, sex, race, and education.

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The study found that the traditional body-mass index (BMI) was in some cases a better predictor of cardiometabolic risks like diabetes and hypertension, compared to the new phenotypes classification. The data revealed that individuals with high levels of fat and low levels of muscle were less physically active and had less healthy diets. The high-adiposity/high-muscle phenotype had the lowest physical activity and nutrient intake and was at the greatest risk of poor cardiometabolic health. In contrast, individuals with low levels of both fat and muscle had lower BMIs and waist circumferences but had weaker grip strength.

The findings of the study highlight the importance of considering factors beyond BMI in evaluating overall health. While BMI can provide a quick and inexpensive overview of cardiometabolic risk at the population level, a more comprehensive evaluation of body phenotypes may provide a better understanding of an individual’s health status.

In conclusion, the study emphasizes the negative impact of excess adiposity on overall health and highlights the need for a more comprehensive approach in evaluating an individual’s health status. The findings could lead to the development of more effective strategies for promoting health and preventing disease.

As the researchers noted, further research is needed to fully understand the relationship between body phenotypes and health, and to develop strategies that can help individuals achieve and maintain optimal health.

doi: 10.1016/j.ypmed.2022.107282