The best measure of whether you are a healthy weight is the body mass index (BMI). This is calculated using your weight and your height. In adults, a healthy weight range is a BMI of 18.5 to 24.9. If your BMI is under 18.5 then you would be considered underweight.
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].
The medical term for 'skinny fat' is technically MONW or “metabolically obese, normal weight” and “Sarcopenic obesity”. Skinny fat people are often a normal weight (or underweight!) but because of their sedentariness, lack of muscle, or poor diet, they have a high percentage of body fat.
Common reasons for someone to have belly fat even when they're skinny is: Being too sedentary (inactive), which builds visceral fat around the organs and abdominal fat. Eating too many processed foods, which stores at the belly.
under 18.5kg/m2 – you are considered underweight and possibly malnourished. 18.5 to 24.9kg/m2 – you are within a healthy weight range for young and middle-aged adults. 25.0 to 29.9kg/m2 – you are considered overweight.
A weight under 100–110 pounds (50kg)
So according to this chart even a healthy man who works out a lot or has a high bone density and weights above 75kg would be considered overweight.
This means a person with a height of 150cm and a weight of 45kg would have a BMI score of 20. According to the BMI, that person would be in the “healthy weight range”. Medical experts advise that this equation only applies to adults, and should not be used as a guide for children.
BMI score of 22.86 for 70 kg weight and 175 cm height shows that your weight is Normal, according to the BMI chart and classification.
A weight of 45 kg is 99 pounds. Even at 5 feet( 152 cm) 45 kg sounds a bit on the light side of optimal weight.
Women with a BMI of less than 18.5 are considered underweight. The average woman's height is 5 feet, 4 inches. If you weigh 107 pounds or less at this height, you are considered underweight with a BMI of 18.4. A healthy weight range for that woman would be 108 to 145 pounds.
The approximate height where 45 kg is slightly underweight and 60 kg is slightly overweight is 5′5″ (165 cm). At 5′7″, 45 kg is considered very underweight but 60 kg is normal. At 6′ (183 cm), both are considered underweight.
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.
If you are skinny and can't put on size, you most likely need to eat a lot more than the average person like me. This means your caloric intake is likely to be 3500-4000 calories to start. Uncommon goals require uncommon solutions. Follow guidelines below to calculate your starting point.
The best measure of whether you are a healthy weight is the body mass index (BMI). This is calculated using your weight and your height. In adults, a healthy weight range is a BMI of 18.5 to 24.9. If your BMI is under 18.5 then you would be considered underweight.
The phrase 'skinny fat' or metabolically obese normal weight (MONW) is used to describe someone who appears to be lean, but actually has a high body fat percentage. If they were to calculate their body mass index (BMI) or even weigh themselves, they may appear to be healthy, but this can be deceiving.
Body Mass Index
A BMI of over 25 kg/m2 might suggest that you are overweight. A BMI of less than 20 kg/m2 indicates that you might be slightly underweight and at increased risk of malnutrition. A BMI of less than 18.5 kg/m2 might indicate that you are underweight and already malnourished.
Muscle is denser than fat, and as it is more compact within your body, as you gain muscle mass, you end up looking thinner, no matter your physical weight. So, if you've been doing a lot of strength training lately, it's likely this is the reason that you're looking fantastic but not dropping those numbers.
The lightest adult of all time is believed to be the Mexican woman Lucia Zarate who weighed only 4.7 pounds (2.13 kg) at the age of 17 (and was 21.5 inches tall).
If your BMI is 18.5 to 24.9, it falls within the Healthy Weight range. If your BMI is 25.0 to 29.9, it falls within the overweight range. If your BMI is 30.0 or higher, it falls within the obese range.