Using stretch stitch on sewing machine, you can create stretchy fabric cable.
The picture shows 9 line stretchy fabric cable, which resistance is 150 ohm/m.

Base Fabric: Cotton jersey
Top thread: normal thread
Bottom thread: Lame Life Saver
Stitch: stretchy, width 2.2, length 2.5

* when sewing, the foot of the machine could not hold the fabric well. I used thin paper under the cotton jersey and sew it together to help the foot. If you do this method, you need to take off the paper from stitch afterwards, which is an extra work…