Table 1.

Male part data in adult human body inertia parameters.

Somatic Segment Name	Centroid Measurement Starting Point	Centroid Position (Unit: mm)	Centroid Relative Position (unit: %)	Relative Mass (unit: %)
Neck	vertex	117.8	46.9	8.62
Upper trunk	Cervical vertebra	115.6	53.6	16.82
Lower trunk	Lower thoracic point	177.8	40.3	27.23
Thigh	Tibial point	254.5	45.3	14.19
A lower leg	Medial malleolus point	224.1	39.3	3.67
Upper arm	Bony point	163.3	47.8	2.43
Forearm	Point of the styloid process of the bone	136.6	42.4	1.25
Hand	Fingertip of middle finger	114.2	36.6	0.64
Foot	Plantar	38.2	48.6	1.48
Whole	Top	734.2	43.8	-

Note 1: the centroid position (M.C.) is determined by the distance from the measuring point to the centroid of the body. Note 2: the average value of the table is the average age of 11,164 adult men (18 years and 60 years old). Note 3: the relative position of the center of mass is the percentage of the upper part of the center of mass in each body segment. Example: the relative position of the center of mass of the head and neck = (head to center mass to head distance head neck length) × 100%; Relative weight of head and neck = head neck mass/overall quality) × 100%.