Well, all I can say is maybe they should eat more if they are using women's squat suits.
Second, they are using their arms to pull themselves up.
They are using a SS bar, which is good for balance, but I think these kids could benefit more from getting under the bar with a belt and knee wraps instead of a squat suit. Especially since they are just wrestlers. I mean 115 pound kid squatting 400 lbs, not impossible, but he didn't hit depth and would the positioning of their arms would seem to be a good way to hurt the back.