This tutorial will show you how to knit into the stitch below to work fisherman's rib.
Fisherman’s rib creates a densely ribbed stretchy fabric which is often used for chunky knitted sweaters and scarves.
Like most ribbed knitting patterns, this uses a combination of knit one purl one, but instead of a normal knit stitch you knit into the stitch below (k1b).
The pattern used for this tutorial is:
Cast on an even number of stitches
Row 1: purl all stitches
Row 2: (p1, knit into the stitch below), repeat to the last 2 stitches, p2
Next rows: Repeat row 2
To do knit one below, on row 2 after the purl stitch take the yarn to the back of the work as if you were going to knit the next stitch. Insert the right needle into the space below the stitch on the left needle, as shown by the arrow.
Knit the stitch as normal, wrapping the yarn around the right needle and pulling the loop through. Then allow the stitch to fall off the left needle.
The reason this rib is so chunky is because you have 2 stitches around this stitch, which you can see from the back of the knitting here.