This variety gives a twisted effect. The closer the foundation of running stitch is done, the more enhanced would be the twisted effect.

whipped running stitch 1      Fig 1: Lay the foundation by doing a running stitch.
Bring out through near the first stitch. Now, pass the needle under each stitch from the top.
whipped running stitch 2
Fig 2: Continue this pattern to finish the design as shown.
Make sure that while taking the needle and thread under each running stitch, you do not pluck the fabric underneath.
If you happen to take the thread between each running stitch from the bottom of the stitch, then maintian it by taking from the bottom only. The trick is to give it a twisted effect.