because we do got a problem with that!!!!!
If you are on your back with your hips and knees in flexion, your legs make a triangle with your knees at the peak.
flexion
flexion and extension
It is Flexion and Extension
list movements for trunk flexion
Plantar flexion
Plantar flexion occurs in your feet.
plantar flexion and knee flexion
balance
balance
Flexion is movement during which the knees or elbows are bent to decrease the angle of the joint
Flexion (noun) = the action of bending or the condition of being bent, especially the bending of a limb or joint. "flexion of the fingers"