-
x

Meet New Friends!

Recommended friends are based on your interests. Make sure they are up to date.

Friends
Kidzworld Logo

Body Mass Index (BMI)

What’s your ideal weight? The Body Mass Index (BMI) is a mathematical equation that is supposed to tell you whether you have the ideal weight for your height. Does it work? Let’s investigate…

Body Mass Index
 

Adolphe's Equation

It was 1830 when a famous mathematician from Belgium named Adolphe Quetelet came up with the BMI equation. This is how you do it:

  • Weigh yourself in pounds (lbs)
  • Find your height (inches)
  • [Weight / (Height x Height)] x 703 = BMI

Body Mass Index Chart

Now once you have your answer, there is a chart where you can find your number and it will tell you if you are the ideal weight for your height. Here are the results:

  • Less than 15 = Anorexic
  • 15-18.49 = Underweight
  • 18.5 - 25 = Ideal
  • 25 – 30 = Overweight
  • 30 – 40 = Obese
  • More than 40 = Morbidly Obese

Extra Experiment

Hmm, I am a little skeptical about this formula and results. How could this chart determine whether someone is obese without considering how much body fat someone has compared to their muscle mass? Muscles weigh more than body fat so would that be fair to people with lots of muscles? Just for fun, let’s experiment and see how some famous athletes match up to these results.

Tom Brady (quarterback for New England Patriots)

[225 lbs / (76 x 76 inches)] x 703 = 27 - Overweight

Kobe Bryant (Point Guard for the Los Angeles Lakers)

[200 lbs / (78 x 78 inches)] x 703 = 25 – Overweight

Serena Williams (the tennis player)

[178 lbs / 70 x 70 inches] x 703 = 25.5 - Overweight

Whaaa??!?! It seems like these amazing athletes have a huge disadvantage. Well, it’s probably because they have so much muscle and muscle weighs much more than fat, so the BMI doesn’t really work for you if you have muscles. Let’s see how it would work for someone a little more normal… how about a famous actor?

Tom Cruise

[201 lbs / (67 x 67 inches)] x 703 = 31 – OBESE???

OMG! If Tom Cruise is obese, maybe the equation doesn’t work very well for short guys either. Let’s try someone else we can all relate to…

Justin Bieber

[130 lbs / (65 x 65)] x 703 = 21 - IDEAL!!!

Kidzworld Conclusion

Hooray, so I guess if you are a singer with a cute haircut, the BMI is a perfect chart to help you find out if you are at your ideal weight... Uhhhh anyways, maybe since this equation was invented over 150 years ago, we should invent a new method. People have changed a lot in the past century. We eat differently, we play more sports, as more cultures combine in America, our bodies are changing. The BMI is total BS!

Related Stories:

 

Related Stories

Micro_obesity_micro
Childhood obesity is a BIG problem. It can cause serious physical and mental health issues includ...
Micro_a micro
Donovan McNabb and the Washington Redskins set a World Record this week, but it had nothing to do...
Vector Entertainment and the National Childhood Obesity Foundation want to encourage all you kids...
Poll

Favorite After School Snack?

  • Milk and cookies.
  • Veggies or fruit.
  • Chocolate or chips.
  • Pita with hummus or salsa.

Sports In The Forums

unicornsrule626
"rainbowpoptart" wrote:I hate to be that person who pulls out the dictionary, buuuuut let's look at the definitions for sport (athleticism wise).competitive physical activity: an individual or group competitive activity involving physical exertion or skill, governed by rules, and sometimes engaged in professionallyDoes cheerleading fit under this definition? Yes.pastime: an active pastime participated in for pleasure or exercise Oh look, cheerleading fits under this definition too.Being a cheerleader requires a certain amount of physical fitness. You need to be strong, flexible, and energetic, which are all things not everyone has.It is a form of exercise and entertainment.It is a sport.Is one variant more challenging than the other? Yes, but that does not devalue anything.Not everyone is going to be able to understand the difficulties cheerleaders go through, and that's perfectly fine. Every sport is dangerous, some are just more obvious than others. When people are good at what they do, they make things seem easy. very well said! I was a cheerleader for 2 years until  I aged out, but let ,e tell you, they were 2 of the best,sweaty and most fun years I have ever had
reply 2 days
rainbowpoptart
I hate to be that person who pulls out the dictionary, buuuuut let's look at the definitions for sport (athleticism wise). competitive physical activity: an individual or group competitive activity involving physical exertion or skill, governed by rules, and sometimes engaged in professionally Does cheerleading fit under this definition? Yes. pastime: an active pastime participated in for pleasure or exercise  Oh look, cheerleading fits under this definition too. Being a cheerleader requires a certain amount of physical fitness. You need to be strong, flexible, and energetic, which are all things not everyone has. It is a form of exercise and entertainment. It is a sport. Is one variant more challenging than the other? Yes, but that does not devalue anything. Not everyone is going to be able to understand the difficulties cheerleaders go through, and that's perfectly fine. Every sport is dangerous, some are just more obvious than others. When people are good at what they do, they make things seem easy.
reply 2 days
angelover4
CHEERLEADING IS LIKE DANCE GYMNASTICS MIXED TOGETHER WITH WORDS. AND DANCE AND GYMNASTICS ARE CONSIDERED SPORTS.
reply 2 days
angelover4
I BELIVE ITS A SPORT JUST LIKE I THINK GYMNASTICS IS A SPORT.
reply 2 days
angelover4
I BEL ITS A SPORT JUS TLIKE I THINK GYMNASTICS IS A SPORT.
reply 2 days