Characteristics of Pose running; 1.Landing as close as possible under the body over the BOF=ball of foot (with BOF, hip and shoulder aligned) 2.Use of gravity as the motive force in running by leaning forward, (releasing the COM=center of mass over, in front of support). Don't bent in the waist! 3.COS (change of support) by pulling the foot from the ground via hamstring activity. So there is no active (conscious, intended) push-off on support. Use of tendon- and muscle elasticity of plantar fascia, achillis, calve muscles, quadriceps, ITB etc., helps the body to regain height to change support again 4.Speed, ROM (range of motion) of limbs and cadence depends on the angle of lean and the ability of the runner to change support efficiently. The movement of the legs results from use of muscle- and tendon elasticity, gravity and momentum/inertia. An active landing should be avoided (extension of knee, dorsalflexion of foot, forced BOF landing). The thighs should stay relaxed in the swing-phase. So no knee drive! The knee moves forward, not up (or only minor due to momentum when speed is high).
BTW; To make good use of muscle-tendon elasticity, the minimal cadence in poserunning is 180 spm