What does と言わんばかりの mean here?


I checked out the other と言わんばかり stuff here, but I don't understand this still.

[![Context](https://i.stack.imgur.com/EiMrV.png)](https://i.stack.imgur.com/EiMrV.png)

The translation I have is: **"Wide step, and slower steps than at
competitions. Both are movements that push you to the edge of losing your
balance."**

I understand どっちも = both バランスを崩す = losing your balance と言わんばかりに = as if to say

Not sure about what ぎりぎりの動き means (probably that it's a risky movement ?), but
what does this last part literally mean? Thanks!

