I have recently gotten my wife into cycling. She is really doing well, and knows how to ride. I have been working with her to learn cadencing and gear choice. I have showed her sites like Sheldon Browns and Ken Kifers. Currently we are averaging 13 mile rides for around 40-50 miles a week.

The thing she is have a problem with is standing on hill climbs. She is still building strength, and we are riding easy routes, but occasional hills grind her to a halt. A little push out of the saddle would do it for her, but she can't figure out how to stand and pedal. I have tried explaining it, and showing her, but I am not sure how to go about teaching her.

Anybody ever had this issue? Any recommendations? Thanks!