Obesity and BMI Explained: Categories, Health Risks & Next Steps in Palm Beach County, FL

What it involves

Body mass index, or BMI, compares your weight with your height. The CDC calls it a screening measure and one potential health indicator that should be considered with other factors, not a diagnosis on its own. A visit looks at the number together with your waist, blood pressure, blood sugar, cholesterol, history, and goals, so you leave with a plan that fits you and not just a category.

Who this is for

• Adults who calculated their BMI and want to know what it means for their health
• Patients whose weight has changed over time and who want a realistic plan
• Patients with high blood pressure, prediabetes, or diabetes who are told weight is part of the picture
• Patients who want a judgment-free conversation about weight with a primary care provider

What to expect

• Height, weight, and blood pressure measured, and your BMI worked out
• A review of your medical history, medicines, eating, activity, and sleep
• Blood work to look at sugar and cholesterol when your provider thinks it is useful
• A small number of specific goals and a date to check in again

The adult BMI categories

The CDC lists these categories for adults aged 20 and older:

• Underweight: a BMI under 18.5
• Healthy weight: 18.5 to under 25
• Overweight: 25 to under 30
• Obesity: 30 or higher, split into class 1 (30 to under 35), class 2 (35 to under 40), and class 3 (40 or higher)

What BMI does not tell you

The CDC says BMI is a screening measure and should be considered with other factors. It does not measure body fat directly, where the weight is carried, your fitness, or your blood work. NIDDK adds that overweight and obesity matter most for health when you carry extra fat around the waist. That is why a provider adds waist, blood pressure, sugar, and cholesterol to the BMI before saying anything about your risk.

Weight and blood sugar

NIDDK says nearly 9 in 10 people with type 2 diabetes have overweight or obesity, and that people at risk may prevent or delay diabetes by losing at least 5 to 7 percent of their starting weight, which for a 200-pound person is about 10 to 14 pounds. The prediabetes A1C range guide explains the blood test, and the diabetes management visit covers follow-up.

Weight and blood pressure

NIDDK says overweight and obesity may raise the risk of high blood pressure, partly because the heart has to pump harder to supply a larger body, and that losing enough weight to reach a healthy BMI range may lower high blood pressure. The ranges and home measurement are explained in the blood pressure readings guide, and treatment is covered at the hypertension visit. Extra weight also adds pressure on the knees, as the knee pain evaluation explains using MedlinePlus figures. Extra weight is also listed by MedlinePlus as a risk factor for asthma, which the asthma symptoms evaluation covers, and as a risk factor for gout, which the gout evaluation explains.

Weight and the heart, liver, and metabolism

NIDDK links overweight and obesity to conditions that can lead to heart disease, including high blood pressure and high cholesterol, and to fatty liver disease, where it says losing 3 to 5 percent of body weight may reduce liver fat. It also describes metabolic syndrome, a group of conditions that includes a large waist, high triglycerides, high blood pressure, high fasting glucose, and low HDL. The heart disease risk review puts these together. Sleep trouble often comes up alongside weight, and the insomnia and sleep problems guide describes what a provider asks about sleep habits and medicines. MedlinePlus also lists obesity among the factors linked to carpal tunnel syndrome, which the carpal tunnel and wrist pain guide explains along with the other causes of hand numbness and wrist pain. MedlinePlus lists obesity and a large neck size as risk factors for obstructive sleep apnea, and the sleep apnea guide describes the daytime symptoms to watch for.

When weight changes without a plan

Gaining weight you did not expect is a different visit from planned weight loss. Patients in that situation can read about the unexplained weight gain evaluation, which covers the history, medicine review, and thyroid and other tests a provider may consider. The goal of any plan at this practice is a few specific steps you can keep, reviewed on a schedule, and not a dramatic target. Sudden weight gain is one of the listed risk factors for plantar fasciitis, a common cause of heel pain, as the heel pain and plantar fasciitis guide explains. Weight that falls without a plan is just as worth checking, and the unintentional weight loss guide explains the 10-pound or 5 percent mark MedlinePlus uses.

Sources

• CDC — Adult BMI Categories
• NIDDK — Health Risks of Overweight & Obesity