Hello !
Your gestures lines are goods ! only the bottom one ( the guy with the red spido t posing ) is a little off, dont forget than the line that take the form of the movement is associated with the form of the spine, the spine only bend outward if you bend in front of you, unless that its always a ( curve.
So judging by the posing it should be inverted ! ( try to do the pose yourself and feel your spine ! )
Dont hesitate to take your time and redraw multiple times using ctrl z to have the perfect line !
Anyway, i hope you will enjoy drawing as i do and i cant wait to see your results !
