[Vocabulary] flat and size out?

[njt2009]

Please explain the underlined phases of the following paragraph.

“Imagine you're stuck between two panes of glass” (in triangle).
When you think about it, doesn´t this actually sound kind of horrifying? I'm pretty claustrophobic, and when I´m getting my trikonasana on, envisioning myself trapped in a small, tight place doesn't exactly help with the whole ¨calming the nervous system” thing. Plus, from an anatomical perspective, you don't really want a ¨flat¨ triangle pose. Whenwe try to snuggle up inside imaginary glass panes, we end up pushing the pelvis forward, creating the same basic misalignment as tucking the tailbone. Instead, focus on maintaining healthy curves in your spine (not flattening or erasing them!) and finding a balance between the internal and external rotation in your legs. In general, your back thigh will need a little internal rotation, and your front thigh will need a little more external rotation. Keeping the back thigh lifted (and drawing the front hip under) may size you out of the glass panes, but your hips will be a lot happier in the long run.

 

[Barb_D]

I hope you don't mind, but I changed your font size from "microscopic" to "legible."

Is this about yoga or something?

 

[Tdol]

I think that the person means that thinking you're stuck between two planes of glass is not the best way and you have to add the element of depth by not pushing your pelvis forwards. Doing it in this three-dimensional way may mean that your body wouldn't fit between the imaginary panes of glass, but your hips will benefit.

(I don't do yoga)