The man was animated in a run cycle using Rotate X 90║ animations entirely.
First, the arms and legs were animated. Each "joint" has two animations applied to it - one for the forward swing, the other for the backward swing. Each joint had to have a Null Parent added to it before it was connected to the parent joint. This allowed two opposite animations to each joint.
After adding Null Parents to each joint and linking them to their respective parents, the limbs were animated. The "thighs" were rotated at 45║ angles forward and backward. Rotate X 90║ animations were applied to each Null Parent and Joint. In the Animation Editor, each animation object was shortened to half its original time interval and moved to the beginning or end of the animation, depending on the limb. The Null Parent animation was moved to one end, the Joint Parent to the other. One or the other was reversed in the Animation Editor. This allowed the limb to swing in one direction and then the other. Then, in the Animation Editor, everything was "tweaked" to the proper timing to give a more realistic run cycle.
With all the limbs animated properly, everything is linked to the main body. An Up / Down animation is applied to the entire Man object, scaled down, and shorted in time to about 33 frames. This allowed the man to "bob" up and down, as people do when they walk or run.
The Manrun.S3D file is an excellent reference for adding running characters to your animations.
