The actress Jamie Alexander that is playing Thor's sometimes Asgardian squeeze, Lady Sif, has been hard at work with stunt training:
www.superherohype.com/news/thornews.php?id=8831
Hmm....perhaps we might see the superstrong Sif (well, all the Asgardians are superhuman) in action? Ironically, Jaime Alexander, the actress portraying her, played the 'superpowered' female equivalent to Kyle on Kyle XY.
ElF