She isn't dilating or effacing? When you say no seriuous contractions, do you mean she was having less than 4/hour? Do you know if they saw funneling of her cervix on an ultrasound or had another reason to suspect preterm labor? A positive fetal fibronectin test? It does seem unusual that if none of the above are factors that they would keep her on bedrest. I would advise her that if she is not currently showing any more signs of PTL that she ask her doc about the bedrest and suggest to him/her that she try a lighter activity load than normal, and see how she does.