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. Take a look at the information and height and weight charts for teens presented in this article if the question “How much should I weigh for my age and height” is bothering you.

Average Height and weight Charts for TeensFaster 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.

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 (比率)．

Body Mass Index (BMI)

You may use the following formula to calculate our BMI:

As per SI Units (国际单位)

BMI= mass (kg)/[height(meters)]²

Following conclusions can be derived from (得到) calculating the BMI:

Places all over the world are named in similar ways. Quite often there is no official naming ceremony but places tend to be called names as points of reference by people. Then an organized body steps in and gives the place a name. Often it happens that a place has two names: One is named by the people and the other by the government. As in many areas, old habits died hard, and the place continues to be called by its unofficial name long after the meaning is lost.

Many roads and places in Singapore are named in order that the pioneers will be remembered by future generations. Thus we have names such as Stamford Road and Raffles Place. This is in keeping with traditions in many countries—in both the West and the East.

Another way of naming places is naming them after other places. Perhaps they were named to promote friendships between the two places or it could be that the people who used to live there were at first from the places that the roads were named after. The mystery is clearer when we see some of the roads named after former British military bases (军事基地) . If you step into Selector Airbase you will see Piccadilly Circus—obviously named by some homesick Royal Air Force soldiers.

Some places were named after the activities that used to go on at those places. Bras Basah Road is an interesting example, “Base Basah” means “wet rice” in Malay (马来语) . Now why would anyone want to name a road “Wet Rice Road?” The reason is simple. During the pioneering days, wet rice was laid out to dry along this road.

A few roads in Singapore are named by what they look like. There is “Circular Road” for one. Another road Paya Lebar Crescent is called a crescent (月牙) because it begins on the main road, makes a crescent and comes back to join the main road again.