Ritesh Das is a Fitness Trainer. A fitness trainer is someone who leads, instructs, and motivates individuals or groups in exercise activities, including cardiovascular exercise (exercises for the heart and blood system), strength training, and stretching. They work with people of all ages and skill levels. Hiring a personal fitness trainer might seem like a luxury if you are on a tight budget, but if you really want to get the most out of your workouts, a trainer is a great investment. The improvement in your health and fitness levels can have long-term payment in quality of life, and even decreased health care costs.