Shaun T. is the mind behind the viral "Insanity" workout. In his new book, "T is for Transformation," Shaun talks about what motivates him to exercise. Shaun told Business Insider that you shouldn't ...

Forbes contributors publish independent expert analyses and insights. I write about relationships, personality, and everyday psychology. When it comes to staying active, the biggest challenge often ...

I write a lot about motivation, because finding long-lasting motivation to exercise is perhaps the most important part of your exercise journey. You can find lasting motivation in your self-identity, ...