Tables
Table 1 Centre of gravity of a human body
Body Segment
|
Place of Centre of Gravity |
Weight Ratio of Body Parts |
Head- neck-body |
From the top of the head 60,4% From the hip 39,6% |
|
Head |
Skull Turkish saddle or the external ear canal |
0,081 |
Body/Torso |
|
0,497 |
T 1 ( chest ) |
In the height of Th. 1-12 midpoint of symmetry axis between segments bounded with transverse plane |
0,264 |
T2 (abdomen ) |
In the height of L. 1-4 midpoint of symmetry axis between segments bounded with transverse plane |
0,093 |
T3 (pelvis) |
In the height of pelvis midpoint of symmetry axis between segments bounded with transverse plane |
0,140 |
Upper arm –forearm, hand |
From shoulder joint 51,2% Ulna 48,8% |
0,050 |
Forearm - hand |
From wrist 67,7% Ulna 32,3% |
0,022 |
Upper arm |
From shoulder joint 43,4% From elbow 56,4% |
0,028 |
Forearm |
From elbow 43,0% From wrist 57,0% |
0,016 |
Hand |
From wrist 50,6% From the 3rd fingertip
|
0,006 |
Thigh – leg |
From wrist 43,4% From internal ankles 56,6% |
0,161 |
Shin - Leg |
From knee joint 43,3% From internal ankles 56,6% |
0,060 |
Thigh |
From hip 43,3% From knee joint 56,7% |
0,101 |
Leg - shin
|
From knee joint43,3% Ankle joint 56,7% |
0,046 |
Leg |
From heels 42,3% Frome toes (1) 57,1% |
0,014 |
Table 2.defining centre of gravity of a body with the help of three torso segments
Segment | Round weight ratio | „x” coordination | Gr × x | „y” coordination | Gr × y |
---|---|---|---|---|---|
Head | 0,081 | xF | GF x xF | yF | GF x yF |
T1 (chest) | 0,264 | xT1 | GT1 x xT1 | yT1 | GT1 x yT1 |
T2 (abdominal) | 0,093 | xT2 | GT2 x xT2 | yT2 | GT2 x yT2 |
T3 (pelvis) | 0,140 | xT3 | GT3 x xT3 | yT3 | GT3 x yT3 |
Upper arm (right) | 0,028 | xFkj | GFkj x xFkj | yFkj | GFkj x yFkj |
Upper arm (left) |
0,028 | xFkb | GFkb x xFkb | yFkb | GFkb x yFkb |
Forearm (right) | 0,016 | xAj | GAj x xAj | yAj | GAj x yAj |
Forearm (left) | 0,016 | xAb | GAb x xAb | yAb | GAb x yAb |
Hand (right) | 0,006 | xKj | GKj x xKj | yKj | GKj x yKj |
Hand (left) | 0,006 | xKb | GKb x xKb | yKb | GKb x yKb |
Thigh (right) | 0,101 | xCj | GCj x xCj | yCj | GCj x yCj |
Thigh (left) | 0,101 | xCb | GCb x xCb | yCb | GCb x yCb |
Shin (right) | 0,046 | xLsj | GLsj x xLsj | yLsj | GLsj x yLsj |
Shin (left) | 0,046 | xLsb | GLsb x xLsb | yLsb | GLsb x yLsb |
Leg (right) | 0,014 | xLj | GLj x xLj | yLj | GLj x yLj |
Leg (left) | 0,014 | xLb | GLb x xLb | yLb | GLb x yLb |
Sum | Σ(Gr × x) | Σ(Gr × y) |
The coordinates of body weight: x = Σ(Gr × x) ; y = Σ(Gr × y)