During the teenage years, hormonal (荷尔蒙的) changes lead to physical changes like rapid muscle growth, burst in height, and weight gain in both boys and girls.
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Average Height and Weight Charts for Teens
Faster growth in kids usually can be noticed at age 8. Genetic factors also determine the physical growth of a child. So, it is perfectly normal for two kids of the same age to have different weights and heights. The following figures should be used as guidelines only.
| For Boys
| For Girls
|
Age
| Height
| Weight
| Height
| Weight
|
in Years
| in Inches
| in Pounds
| in Inches
| in Pounds
|
12-13
| 58-62
| 85-100
| 60-63
| 95-105
|
14-15
| 63-66
| 105-125
| 63-64
| 105-115
|
16-17
| 67-70
| 130-150
| 64
| 115-120
|
18-20
| 68-70
| 150-160
| 64
| 125-130
|
Ideal Body Fat Percentage
Fit men have 14% - 17% body fat.
Fit women have 21% -24% body fat.
Male athletes have 6% -13% body fat.
Female athletes have 14% - 20% body fat.
The ideal body fat percentage varies mainly according to age, sex and the physical
activity of the individual. But it is a fact that some female athletes have body fat as low as
10 % and some male athletes had lower than 4% body fat. So, it can be observed that other than the above mentioned factors, genetic factors also influence the body-fat ratio.
Body Mass Index (BMI)
You may use the following formula to calculate your BMI:
As per SI Units (国际单位) : BMI =" mass" (kg)/[height (meters) ]
2Imperial (英制的) Units 1: BMI =" mass" (Ib. ) x703/[ height (in. ) ]
2Imperial Units 2: BMI =" mass" (Ib. ) x 4. 88/[ height (ft) ]
2Following conclusions can be derived from (得到) calculating the BMI:
BMI Calculated
| Conclusion
|
BMI 18.5~25
| Normal or ideal weight
|
BMI > 25
| Overweight
|
BMI < 18. 5
| Underweight
|
BMI < 17. 5
| Extremely underweight
|
BMI =" 30" or BMI > 30
| Obese(病态肥胖的)
|
BMI =" 40" or BMI > 40
| Extremely obese
|
4. According to the Average Height and Weight Charts for Teens, ____.
A.girls keep on growing taller during the teenage years |
B.girls grow faster at the end of teenager years than boys |
C.girls grow faster at the beginning of teenager years than boys |
D.boys' average weight is always heavier than girls' during the teenage years |
5. Which of the following statements about ideal body fat percentage is RIGHT?
A.Fit men have higher body fat percentage than fit women. |
B.Male athletes have higher body fat percentage than fit men. |
C.Female athletes have lower body fat percentage than male athletes. |
D.Male athletes have much lower body fat percentage than female athletes. |
6. After calculating the BMI, you can reach the conclusion whether ____.
A.your weight is normal |
B.your hormone level is normal |
C.your height is right for your age |
D.your body fat percentage is ideal |
7. If a boy is 1. 5 meters in height and weighs 68 kilograms, then he is ____.
A.normal | B.obese |
C.extremely obese | D.underweight |