Small BMI Change Could Have Big Blood Pressure Impact

Even small changes in weight can make a big difference in the blood pressure of overweight children. Researchers tracked blood pressure, height and weight of more than 1,100 children, with the longest follow-up exceeding 10 years.

The effect of BMI changes on the systolic blood pressure of overweight boys was 4.6 times that of normal-weight boys. Findings were similar for diastolic pressure in boys, and both blood pressure readings in girls. In normal-weight children, BMI percentile and blood pressure were still related, but the association was weaker.

According to Science Daily:

“BMI and blood pressure studies typically don't separate normal-weight and overweight children, so findings tend to overestimate BMI's effect on blood pressure in normal-weight children but underestimate it in overweight kids”.

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