Obesity is high but the overweight is kinda exagerrated. They recommend weight training but putting on even 10lbs of muscle on a skinny body is enough for the BMI index to consider you "overweight" (Anthony pettis when he fought at lightweight was skinny framed with not alot of muscle and BMI would consider him "overweight").
The BMI is kinda bullshit. Numerous studies have shown that people in the Overweight BMI Range have longer life expectancy and a number of better health outcomes than those in the Normal BMI Range.
I know that makes a lot of people sad and angry, but once again, science doesn't care about your feelings. And the science on BMI goes like this:
Obese = highest mortality (lowest life expectancy)
Underweight = second highest mortality (second lowest life expectancy)
Normal Weight = second lowest mortality (second highest life expectancy)
Overweight = lowest mortality (highest life expectancy)
Also, if you control for blood pressure the disproportionately high mortality rate in obese people almost goes away. (Mind you, high blood pressure is closely related to obesity, especially in men. Just making the point that a man with a high BMI and normal or low blood pressure will likely live longer than a man with a low or normal BMI and high blood pressure.)
Also, for women the ranges just aren't that wide, anyway. Women carry excess fat in different and far less dangerous places.
However, weight does have an affect on the sexual health of women. Underweight and Overweight women both have better sex drives and more success reaching orgasm than Normal weight women.
That's not to suggest weight is irrelevant. All sorts of health and lifestyle benefits to keeping your weight in check. But the BMI itself is a joke. Their ranges are bullshit. The Normal range clearly needs to be adjusted up somewhat both on the bottom end and the top end to better reflect what people should be aiming for. Nothing more tragic than avoiding ice cream all your life and putting in the blood, sweat, and tears required to maintain washboard abs only to die earlier.