Is it normal for a nine year old to be too weak to do a push-up? My stepdaughter is doing fitness tests as the school year closes and admitted to us today that she can't do a push-up.  She knows how to do it, form-wise, but can't lift herself or even lower herself toward the floor--she gets about halfway down and then drops on her face.

She *swears* she's trying (which might not necessarily be the case), but just can't do a push-up to save her life.

She's a little over a hundred pounds, but she isn't fat, she's just tall.  So it isn't like she's too darn heavy to lift herself.  Either way, at nine years old--with no health issues--she should be stronger than this shouldn't she?