about twenty percent of the national football league weighs more than 300 pounds. at this weight,their body mass index (BMI) places them at grade 2 obesity ,which is one step below morbid obesity. determine the mass of a 300 pound (1330) N football player
The Correct Answer and Explanation is :
To determine the mass of a 300-pound (136 kg) NFL football player, we can use the weight directly provided. The mass in kilograms can be calculated by converting the weight from pounds to kilograms using the conversion factor: (1 \, \text{pound} = 0.453592 \, \text{kg}).
Calculation:
- Weight in Pounds: (300 \, \text{lbs})
- Conversion to Kilograms:
[
\text{Mass (kg)} = \text{Weight (lbs)} \times 0.453592
]
[
\text{Mass (kg)} = 300 \times 0.453592 \approx 136.077 \, \text{kg}
]
Thus, a 300-pound NFL player has a mass of approximately 136 kg.
Explanation of Body Mass Index (BMI) and Obesity Classification:
Body Mass Index (BMI) is a widely used method for assessing body weight relative to height. The formula for calculating BMI is:
[
\text{BMI} = \frac{\text{mass (kg)}}{\text{height (m)}^2}
]
The BMI classifications are as follows:
- Underweight: BMI < 18.5
- Normal weight: BMI 18.5–24.9
- Overweight: BMI 25–29.9
- Obesity: BMI ≥ 30
- Class 1 Obesity: BMI 30–34.9
- Class 2 Obesity: BMI 35–39.9
- Morbid Obesity: BMI ≥ 40
A player weighing 300 pounds typically has a BMI that classifies them as having Class 2 Obesity. This classification indicates that the individual is at a heightened risk for obesity-related health issues, such as heart disease, diabetes, and joint problems. In professional sports, particularly in the NFL, many players are above this threshold due to their muscle mass, which can sometimes skew BMI interpretations.
It’s essential to note that BMI doesn’t differentiate between muscle and fat; therefore, while the BMI can indicate health risks, it should be used in conjunction with other assessments for a more comprehensive view of an individual’s health.