It appears that PRACTICE STRETCH will go through all of the motions and not award any Bardic Lore experience, but PRACTICE STRETCHING will. The same for Practice Breathing -- Apparently you have to spell out the word in its entirety or you will not receive any EXP.
~ Leilond
http://i67.photobucket.com/albums/h307/ss1shadow/Leilond_Progression.jpg