The material provided is absolutely amazing and is really detailed. The teachers are very knowledgable and very proactive with your learning. Being in a class of other fitness enthusiasts makes you realise that everyone has a similar mindset and are all supportive of each other. Having previous knowledge or already being very focused on your understanding of "bodybuilding" is very useful in terms of getting to grips with concepts that you learn on the course, however this isn't something that is necessary, it just makes things easier. Also, be prepared to put a lot of time aside out of the classroom as there is a lot of material to cover and homework to complete to ensure you gain a full and well rounded understanding of what's involved in being an excellent and knowledgeable personal trainer. Good luck.