Pose Running and Forward Thrust

I've been having a debate with some folks about Pose Running and Forward Thrust. The heart of the debate is whether or not there is any forward thrust generated during Post Running. In Pose Running, the forward leg lands and presses upward only into a post (while simultaneously leaning forward). The idea is to minimize bob while stiffening the leg and letting gravitational torque carry the body forward. It is only the forward component of the body's acceleration due to gravity that imparts forward motion. That no backward kick form the leg is necessary, nor even desired. A backward kick is a fault in execution.

I argue that the idea of eliminating the backward kick has created a false hypothesis that during Pose Running, there is no forward thrust (force imparted from the legs against the ground propelling the body forward). In fact, studying the running system, the body must push against the ground to overcome internal joint friction, other internal forms of friction, wind resistance, ground resistance, etc.

To answer this question, first, we should examine the literature and review the running models proposed in Pose Running.  Then, we should review scientific papers looking for data on Ground Reaction Forces.

See list of links for possible info:

1. Running on Ice Video
2. Geometry of Running Paper
3. Scientific Basis of Pose Running
4. Scientific Research & Pose Method
5. Running is a Post Falling
6. Impact Forces at Knee Joint
7. Compare Pose & Heel Running