Every fitness trainer certification requires recertification of some kind, which makes sense: as a personal trainer, your clients must be reasonably confident in your freshness and knowledgeability.  In addition to keeping CPR and AED certification current, trainers are required to gather continuing education credits (CECs), the specifics of which vary for each certification. There is also a recertification fee usually required every two years which ranges broadly from $25-$75, depending on the program.