(For example, if fitness is new to you, jumping right into P90X probably won't feel very encouraging or enjoyable.)
It's also key to listen to your body, especially when it comes to programs with high-intensity workouts. Rest when you need to, don't push through pain, and choose a program that suits your fitness level. (For example, if fitness is new to you, jumping right into P90X probably won't feel very encouraging or enjoyable.)