1. Motivation
   Personal trainers wear many hats, serving not only as a coach, but also as an educator, confidant, role model and a major source of motivation and encouragement.
    
2. Consistency
   Do you find it difficult to stick to your program? Scheduling regular appointments with a personal trainer helps eliminate any excuses you may come up with for not exercising.
    
3. Safety
   Unsure about how to use the chest-press machine at the gym or how to perform walking lunges without hurting your knees? A personal trainer will show you how to exercise safely (including exercises to avoid), and instruct you on the proper and safe use of exercise equipment.
    
4. Individualized instruction
   An exercise program that works for one person may not work for another. A personal trainer will develop the most effective program for you based on your fitness evaluation results and personal goals.
    
5. Effective workouts
   Today's hectic lifestyles mean you don't have time to waste on ineffective exercise routines. Personal trainers help maximize your time by providing workouts designed to meet your goals quickly and efficiently.
    
6. Supervision
   Personal attention during exercise is the primary function of personal trainers. Need someone to spot you while you do pull-ups? Looking for feedback on your running form? That's what your personal trainer is for: to observe, assist and, if necessary, correct as needed.
    
7. Sports-specific training
   Many amateur and professional athletes work with a personal trainer during the off-season to prepare themselves for in-season competition. Whether you want to shave some strokes off your golf score or beat your brother-in-law at tennis, a personal trainer can tailor your program to your sport of choice.
    
8. Injury rehabilitation
   Injuries and accidents can prevent you from participating in your favorite activities. An experienced personal trainer, however can make the road to recovery a smooth one by recommending exercises that emphasize overall muscular balance to prevent future injuries.
    
9. Special-needs-training
   Research confirms that individuals with health challenges such as diabetes, asthma, osteoporosis or heart disease benefit greatly from regular physical activity. These conditions, however, can make exercising safely a challenge. Many personal trainers are experienced in designing programs that address the special needs of these and other conditions.
    
10. Ego boost
    It's a fact - feeling good makes you look good, and vice versa. Not only can personal trainers help you achieve your health and fitness goals, they provide you with positive feedback on your performance and bolster your confidence to take on new challenges.

(courtesy of the American Council on Exercise and Club Industry)