Which of the following is not true about the body mass index? a. uses statistical data of weight and height across the population b. measures the percentage of one's body fat directly c. relies on a correlation between weight and body fat d. does not account for one's body frame size or muscle content

no, because those are both different running competitions. while distance runners train their legs and their lungs to run long amounts of time, the sprinters are training their legs and their lungs to give all they have in the little amount of area they need to cover. the brain also plays a huge part in all of this.

the brain is the only thing in your body that sends messages to your body telling you to run. if you are a long distance runner and you have the mind set of a sprinter, you will not get anywhere. if you have a long distance mind set and you have to run 200m in 20 seconds then you will not make it in time.

b) the heart is a pump made of muscle and that is difficult to grow in the lab.