[Retracted] Detection Method of Limb Movement in Competitive Sports Training Based on Deep Learning

Table 4

Degrees of freedom and range of motion of some joints of the human skeleton model.

Joint name	Joint	Degree of freedom	Activity range limit
Neck	Chest	3	0–90°
Left shoulder	Chest	2	0–180°
Right shoulder	Chest	3	0–180°
Left elbow	Left arm	3	0–150°
Right elbow	Right arm	2	0–150°
Left side	Waist	3	0–130°
Right side	Waist	2	0–130°
Left knee	Thigh	3	0–145°
Right knee	Thigh	2	0–145°
Left ankle	A lower leg	3	0–90°
Right ankle	A lower leg	3	0–90°