Subscription-based application service provider (ASP) services featuring computer software for estimating and displaying a graphical summary of weight gain and weight loss scenarios arising as a result of an exercise and dietary regime, computer software to be used with a personal digital assistant (PDA) for monitoring caloric expenditure and recording dietary intake, computer software for analyzing and displaying projected weight gain and weight loss scenarios arising as a result of the monitored caloric expenditure and recorded dietary intake, and computer software for the display and monitoring of the projected weight gain and weight loss scenarios of one or more individuals participating in exercise, weight-loss and obesity, or wellness programs; subscription-based application service provider (ASP) services featuring computer software for continuously analyzing the functional behaviors of the musculoskeletal and cardiovascular systems of a person engaged in an exercise program, computer software to be used with a personal digital assistant (PDA) for monitoring physical activity and displaying feedback on the PDA screen which guides the user through the exercise program; application service provider (ASP) services featuring a human performance computer database accessible by a person engaged in an exercise and dietary regime via a website accessible by means of a local area network or the Internet, and featuring the graphical summary and display of the projected weight gain and weight loss scenarios of one or more individuals participating in exercise, weight loss and obesity or wellness programs