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You never outgrow your need for physical activity. As you age, you need to be even more dedicated to being active. Normal aging results in a gradual decline in heart and lung function, nerve function, and muscle and bone strength. Being active improves your heart and lungs and allows you to do more work without feeling tired. Physically active older adults have faster reaction times, better balance, and better hand-eye coordination for performing manual tasks. Physical activity can reduce the number of fractures in older adults as well.

A BMI of 20 to 24.9 is considered a healthy weight. A BMI of 25 to 29.9 is considered overweight, but not obese. And a BMI of 30 or greater is obesity. Refer to Table 4-1 to determine your medical risk based on your BMI.

TABLE 4-1 Your Medical Risk Based on Your BMI

BMI	Degree of Obesity	Degree of Medical Risk
20 to 24.9	None	None
25 to 29.9	Mild	Low
30 to 34.9	Moderate	Moderate
35 to 40	High	High
Greater than 40	Severe	Severe

In Table 4-1, medical risk is determined just by your weight. You may have an increased medical risk due to other conditions, such as high cholesterol, high blood pressure, diabetes, or some other condition.