Software as a service (SAAS) services featuring software for allowing personal trainers to offer virtual personal training to individuals and groups via live video; Software as a service (SAAS) services featuring software for virtual personal training; Software as a service (SAAS) services featuring software for session scheduling, payment processing, private live video, and client engagement tools; Software as a service (SAAS) services featuring software for providing video-on-demand training videos; Software as a service (SAAS) services featuring software for virtual personal training with ability to subscribe to a video library; Providing a web site featuring technology that enables internet users to create, bookmark, annotate, and publicly share fitness-related data, as well as providing health and fitness professionals with a subscription-based client management system