I found reading the NASM textbook wasn t enough to retain. I had to read certain sections more than once to get a good understanding. I have a full time job so studying at night was a little tough cause I would fall asleep as I m trying to read the book. Then I found Fitness Mentors and decided to bite the bullet. Best thing ever!! Eddie helped me understand the material so much better and quicker. He explained things in my language… I highly recommend the audio, especially if you have a 25+min commute to work. It s nice to know you can still study if you have to drive anywhere. I took the exam and passed! I highly recommend Fitness Mentors… but you should read the NASM book, highlight and study the areas in the book Eddie tells you to highlight and study hard. Good luck!!