A personal trainer is an exercise professional with the knowledge and experience to offer advice and guidance in the areas of exercise and fitness. These professionals can assist you by designing a safe and effective exercise program to help you reach personal goals. A personal trainer can assist with weight loss, exercise performance and improved wellness. Their expertise allows them to determine what type of exercise routine is best for you based on your goals whether they involve losing weight, gaining strength or improving your time for a 5k race. In addition, trainers have motivating personalities and provide you with a a positive attitude that can help you improve your self-esteem and your outlook on fitness and exercise.