A BMI above 30 falls into the obesity category. When someone reaches this range, the risk of developing serious health conditions increases significantly.
Dr. Honaker emphasizes that if your BMI is in the obese range, the goal should be to begin reducing it into the overweight range, and eventually into the normal range. Even modest weight loss can lead to meaningful improvements in overall health.
Why BMI Is So Important for Your Health
Many people view weight only in terms of appearance, but BMI is much more than a cosmetic measure. It is strongly linked to a variety of chronic diseases and health conditions.
According to Dr. Honaker, obesity can influence a wide range of health problems, including 26 different types of cancer. Researchers have identified strong links between excess body weight and cancers such as:
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Breast cancer
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Colon cancer
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Pancreatic cancer
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Kidney cancer
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Liver cancer
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Endometrial cancer
Excess body fat can create hormonal changes, chronic inflammation, and metabolic disruptions that may increase cancer risk.
Other Health Conditions Linked to High BMI
In addition to cancer risk, a higher BMI is associated with several other major health issues.
Arthritis of the Knees
Carrying extra weight places additional stress on weight-bearing joints. The knees in particular are highly affected, which can lead to osteoarthritis, pain, and reduced mobility.
High Blood Pressure
Obesity is a major contributor to hypertension, or high blood pressure. When body weight increases, the heart must work harder to circulate blood, which can strain the cardiovascular system.
Type 2 Diabetes
Higher BMI levels are strongly connected to insulin resistance, which can lead to type 2 diabetes. Excess fat—especially around the abdomen—interferes with the body’s ability to regulate blood sugar properly.
Sleep Disorders
People with higher BMI levels are also more likely to develop sleep apnea, a condition where breathing repeatedly stops during sleep. This can lead to fatigue, cardiovascular strain, and reduced oxygen levels overnight.
The Good News: Improving BMI Improves Health
One of the most encouraging aspects of BMI is that it can often be improved with lifestyle changes. Even small reductions in weight can significantly lower the risk of many obesity-related diseases.
For example:
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Losing 5–10% of body weight can improve blood pressure and blood sugar control
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Joint pain may decrease as stress on the knees and hips is reduced
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Sleep quality may improve
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Overall cardiovascular risk may decline
Dr. Honaker emphasizes that the goal is not perfection but progress. Moving from the obese range into the overweight range—or from overweight into the normal range—can already provide meaningful health benefits.
How to Calculate Your BMI
BMI is calculated using a simple formula based on weight and height.
For adults, the formula is:
BMI = weight (kg) ÷ height² (m²)
Because many people in the United States use pounds and inches, online BMI calculators make the process quick and easy. By simply entering your height and weight, you can instantly see your BMI score and category.
Knowing this number allows you to track your progress and discuss your health goals with your healthcare provider.
Should BMI Be the Only Health Measure?
While BMI is useful, doctors consider it a screening tool rather than a complete diagnosis.
It does not measure:
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Muscle mass
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Body fat distribution
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Fitness level
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Metabolic health
For example, athletes with high muscle mass may have a higher BMI but still be extremely healthy. That’s why healthcare providers often combine BMI with other factors such as waist circumference, blood pressure, cholesterol levels, and overall lifestyle.
Take Control of Your Health
Dr. Honaker’s message is simple but important: everyone should know their BMI.
Understanding where your BMI falls can provide valuable insight into your health risks and help guide lifestyle decisions that support long-term wellness.
If your BMI is higher than recommended, small changes—like improving diet, increasing physical activity, and working with a healthcare professional—can make a meaningful difference.
The key is awareness. Once you know your BMI, you can begin taking steps to move it toward a healthier range and protect your future health.
