A weight under 100–110 pounds (50kg)
People that live in regions such as the Midwest and the South tend to desire more average sizes. In these regions, a woman wearing a size 8 to 10 is considered thin and appealing. Women who are in the 00 to 4 range might be seen as underweight.
At 5′7″ and 120 pounds, you are already slender. If you don't like the way you look, so be it — but you are slender enough that attempting to become noticeably thinner will likely compromise your health.
From a clinical perspective, an individual is considered “too skinny” if they are deemed underweight. According to the Centers for Disease Control, an individual is underweight if their Body Mass Index (BMI) is below 18.5 [1].
Clinically underweight or dangerously skinny for the average woman: A BMI of 15, 16, 17, 18. A weight under 100–110 pounds (50kg)
How Much Should My 13-Year-Old Weigh? The average weight for a 13-year-old boy is between 75 and 145 pounds, while the average weight for a 13-year-old girl is between 76 and 148 pounds. For boys, the 50th percentile of weight is 100 pounds. For girls, the 50th percentile is 101 pounds.
The averages for 12-year-olds are 89 pounds, for males, and 92 pounds, for females. However, beyond biological sex, many other factors influence someone's weight at this age, including their height, body composition, the onset of puberty, environmental factors, and underlying health issues.
Size zero often refers to thin individuals (especially women and adolescent girls), or trends associated with them.
The recommended ranges for healthy men are between 10-20% body fat, and for women, the ranges are 18-28%. If your body fat exceeds these ranges, but you have a normal weight when you stand on the scale, you may be skinny fat.
Overweight children fall between the 85th and 95th percentile, and obese children have a BMI equal to or greater than the 95th percentile. A healthy weight for a 12-year-old girl, therefore, can generally fall anywhere between 65 and 120 pounds.
If your BMI is less than 18.5, it falls within the underweight range. If your BMI is 18.5 to <25, it falls within the healthy weight range. If your BMI is 25.0 to <30, it falls within the overweight range. If your BMI is 30.0 or higher, it falls within the obesity range.
Changes in Boys
They tend to grow most quickly between ages 12 and 15. The growth spurt of boys is, on average, about 2 years later than that of girls. By age 16, most boys have stopped growing, but their muscles will continue to develop.
According to the CDC, most 13-year-old girls weigh between 76 and 148 pounds (lb). The 50th percentile for weight in this group is around 101 lb. This means that about 50% of girls this age weigh less than 101 lb. If a 13-year-old girl weighs under the fifth percentile, a doctor may classify this as being underweight.
As you go through puberty, you'll get taller, your shoulders will get broader, and as your muscles get bigger, your weight will increase. Sometimes the weight gain of puberty causes girls and boys to feel so uncomfortable with how they look that they try to lose weight by throwing up, not eating, or taking medicines.
The National Heart, Lung, and Blood Institute indicates that a healthy weight for a woman who is 5 feet, 4 inches tall ranges from 110 to 140 pounds with a BMI of 19 to 24.
Being thin is not the same as being healthy, experts say. Avoid these common flubs when you're trying to lose weight. — -- In the ongoing war on obesity, health officials have consistently focused on Body Mass Index, or BMI, as a measure of weight appropriate to a certain height.
Shorter-statured women should ideally weigh less than taller women. Whether or not you're too skinny is a matter of preference. However, women who are 5 feet tall and weigh 100 pounds are not classified as underweight, according to the University of Washington.
However, on average, you would need to lose something in the range of 14 to 19 pounds to notice a difference in your weight. Think about it in percentages. You will start noticing the difference, as soon as you lose a minimum of 2% to 5% of your body weight.