Quad Knot

Is a quad knot a legally accepted form of a knot by the United States Navy, Coast Guard or Boy Scouts of America?

Doesn't matter. I've got them, and the quad knot comes in a pair. One for each leg.

I can trace its origin back to Tuesday morning spin. All was going well (average heart rate 143), until towards the end, we isolated our leg muscles -- standing tall, no bobbing and no movement in the hips on down, the only thing moving was my legs.

Or should I say seizing, like pistons in a motor when you should have had an oil change 30,000 miles ago . . . .

And now it is as if my leg musles are perfectly isolated -- right in the middle of my quads.