We’ve all been there. Maybe it’s cold outside. Or you’re tired. Or perhaps the couch is just calling your name. There are lots of reasons to skip a workout. Then a friend calls and talks you into it. They might be supportive, or they could trash-talk you. But they are persuasive. We’ve created three "virtual trainers" to help out, with various forms of encouragement. They’re perfect for sending messages to a friend. So have fun with them.