Demonstrate exercises and routines to clients. Assist clients in exercises to minimize injury and promote fitness. Modify exercises according to client’s fitness levels. Monitoring client progress. Individuals wanting to become personal trainers must take certification with NCCA accreditation through the following NASM (National Academy of Sports Medicine), ACE(American Council on Exercise), NSCA(National Strength and Condition Association, ACSM (American College of Sports Medicine), NESTA (National Exercise Sports Trainers Association), NCCPT (National Council for Certified Personal Trainers), NCSF (National Council on Strength Fitness), ISSA (International Sports Sciences Associations) AFAA (Athletics Fitness Association of America), NFPT (National Federation Professional Trainers).