Salem

While running the hands should be bent at about 60 degrees and with the elbows reaching a bit behind the torso, then going forwards and moving slightly towards the median plane.
The whole torso and head should be slightly bent forwards with the head in a position looking a tiny bit down, but mostly forwards.
It should be synced so left arm goes with left leg, right leg with right arm.
At each step, the char's hips move a teeny tiny bit to the opposite side of whichever leg just hit the ground.
Also try to keep the chars from looking like they are going for a morning jog, since when a chase is happening, both characters should look like they are sprinting, not participating in a race walking event (or like they are happily frolicking through a meadow with blossoming flowers, which is what it looks like now).