Yes I believe the claims testosterone increase are false, but I do like the power posing idea. I can see how that could put a person in the proper state of mind. When I was a young man I generally walked with my head down eyes on the ground. I didn't even realize it. One day an old man spots me walking by and says "young man there is nothing on the ground. Look up...chin up always. I took his advice and I felt better immediately. I still think about that old man, and I still walk chin held high.