IK Test Jump by Richard60 (renderosity.com)

here is a video showing the effects of IK.  I made two small boxes a green and blue they are proxies for IK targets since you can only see them when you pull the foot away from the target.  Andy's feet are constrained to each box right to green and left to blue much like Andy's feet are constrained to the IK targets.  The blue box stays at the start position until about halfway through and then it jumps to the end.  Notice Andy's left leg points to the blue box starting by pointing backwards then pointing forwards.  I have the green box sort of moving with Andy and his leg follows the green box.  I used the Blue and Green boxes to show what those outlines you mentioned are and how they act.  The animation would be built with IK on and without the boxes.  You would take the Hip and move it down some on frame 15.  Go to frame 135 and move the hip and both feet to the landing area translate Z axis.  Zero Hip at Frame 150.  Finally go to frame 75 halfway point and move the hip up so the figure is off the ground.  Ad there you have a long jump.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13