I like lifting heavy weights and I'd like to do more of it, but I'm unsure where to go or how to get there. What is the different between powerlifting, body building, and olympic weight lifting? How does it affect the aesthetics of a woman's body differently? My main focus is on getting stronger, and I don't need big, showy muscles - but I've also heard people say that powerlifters are "fat" and I don't want to be strong-but-fat. Also, I'm 46. Is there one of these that is better for a middle-aged woman? Are injuries likely? How would one go about learning one of them once I decide which is for me?