The Four Body Types

image of the four body types

The Four Body Types you see in the above image are from real, actual people who took the Scientific Body Type Quiz. Depending on weight, a Body Type Two (BT2) can look nearly identical to a Body Type One (BT1), a Body Type Three (BT3) like a BT2, Body Type Four (BT4) like a BT3, and such -- especially the younger you are. Genetically, skinny fat (cellulite, thin fat, loose/saggy skin, crepey skin, normal weight obesity) is more prevalent on BT2, BT3, and BT4's. Due to genetics/DNA, skinny fat exists in place of where there should be muscles/mass (notice the obvious lack of muscles/muscle mass on the BT2 around no less than lumbar 1, BT3 around no less than thoracic 5-12, and BT4 pretty much everywhere?}, which increases the probabilities of being overweight or obese because one pound of muscle burns 6 calories per day but 1 pound of fat/skinny fat burns only 2-3 calories daily. Learn More About Body Type Science and The Role Genetics/DNA Plays.

image of the four body types

(Above) Standard Scientific Human Body Anatomy Book Body Type One (BT1) Found In Any Scientifically Approved Human Body Anatomy Book

Female BT1 Arch & Dimples

Female BT1 Arch

Male BT1 Arch & Dimples

Male BT1 Arch

The Four Body Types Overview

Touch to scroll and see all body types

Body Type One (Video)

Body Type One

Body Type Two

Body Type Three

Body Type Four

Body Type 1
Body Type 2
Body Type 3
Body Type 4
Vertebrae Development and Extension*
Vertebrae Fully Developed along with Posture (Spinal Extension)
Vertebrae Mostly Developed along with Posture (Spinal Extension)
Vertebrae Partially Developed along with Posture (Spinal Extension)
Vertebrae Mostly to Fully Undeveloped along with Posture (Spinal Extension)
Number of Vertebrae -- 7 Cervical, 12 Thoracic, 5 Lumbar, 1 Sacrum, 1 Coccyx -- Fully Developed (out of 26 Vertebrae in terms of 24 Moveable, 2 Fixed)
All 26 Vertebrae Fully Developed (Genetics), relative to the 24 Moveable & Two Fixed Bones & related Muscles/Muscle Mass (0 Vertebrae Underdeveloped/Undeveloped)
18 to 25 Vertebrae Fully Developed (Genetics), relative to the 24 Moveable & Two Fixed Bones & related Muscles/Muscle Mass (1-8 Vertebrae Underdeveloped/Undeveloped)
17 to 09 Vertebrae Fully Developed (Genetics), relative to the 24 Moveable & Two Fixed Bones & related Muscles/Muscle Mass (9-17 Vertebrae Underdeveloped/Undeveloped),
08 to 0 Vertebrae Fully Developed (Genetics), relative to the 24 Moveable & Two Fixed Bones & related Muscles/Muscle Mass (18-26 Vertebrae Underdeveloped/Undeveloped)
Muscles/Muscle Mass Fully Development*
Muscles/Mass Mostly to Fully Developed
Muscles/Mass Mostly Developed
Muscles/Mass Partially Developed
Muscles/Mass Mostly to Fully Undeveloped
Obesity Proclivity*
Very Low To Low Probability of Obesity (Skinny Fat Unlikely)
Low to Moderate Probability of Obesity (Skinny Fat Likely)
Moderate to High Probability of Obesity (Skinny Fat Very Likely)
High to Very High Probability of Obesity (Skinny Fat Extremely Likely)
The Four (4) Body Types - Science/Scientific Data Summary*
A Body Type One (BT1) is the most balanced relative to all of The Four Body Type. A Body Type One has a high probability of being symmetrical. A BT1 usually requires much less maintenance in terms of Diet, Exercise, and Lifestyle to manage and keep healthy. Avoiding obesity is very likely. Skinny fat is unlikely, especially earlier in life. A Body Type One has fully developed muscles/mass and likely is well defined, or easy to attain full definition with minimal effort.
A Body Type Two (BT2), well taken care of, can look almost identical to a BT1. Although a Body Type Two has tendencies to be less symmetrical. A BT2 usually requires more maintenance than a BT1 in terms of Diet, Exercise, and Lifestyle to manage and keep healthy. Obesity tendencies increase relative to a BT1. At least some skinny fat is likely. A BT2 has mostly developed muscles/mass and likely less definition than a BT1. Fully defined status is possible by building muscle/mass. However, keep in mind that using weight lifting/free-weights, machines, or other such conventional repetitive activity means once the repetition stops, the muscle/mass usually is readily lost.
A Body Type Three (BT3) Body is usually much less symmetrical and requires much greater effort in terms of Diet, Exercise and Lifestyle to manage and keep healthy. For a Body Type Three, avoiding obesity can be very difficult, as even when skinny, normal weight obesity is common. Skinny fat, in general, is very likely. A BT3 has much less developed muscles/mass and has a much harder time achieving defined status of any degree. Fully defined status is likely not really possible with conventional muscles/mass building effort. Keep in mind that using weightlifting/free-weights, machines, or other such conventional repetitive activity means once the repetition stops, the muscle/mass usually is readily lost.
A Body Type Four (BT4) Body is the least balanced of all body types and typically not symmetrical, especially as it ages. A Body Type Four likely requires monumental effort in terms of Diet, Exercise and Lifestyle to successfully manage and keep healthy. Avoiding obesity entirely is very likely impossible, as even when skinny, normal weight obesity is very common. Skinny fat, in general, is extremely likely. A BT4 has mostly to fully underdeveloped muscles/mass. Fully defined status is very likely impossible with conventional muscle/mass building effort. Keep in mind that using weigh training/free-weights, machines, or other such conventional repetitive activity means once the repetition stops, the muscle/mass usually is readily lost.
*The Four Body Types Science/Scientific Research Data to Date