Three of these moves are included in a list that some trainers have dubbed "the Big 5" (planks, push-ups, burpees, mountain climbers and squats). Done right, and often, you'll build more than strength - you'll also improve your balance, mobility, range of motion and muscle endurance. That's because these movements recruit muscles in areas that lifters have a tendency to ignore (obliques, forearms, ankles, etc.).