Many trainees believe you must perform different types of exercises to train a muscle effectively. Is this true? Not at all. Oftentimes, a single, well-chosen exercise can target ALL parts of the muscle.
For example: when exercising the chest muscles, the bench press (or if training with body weight, the press-up) strongly activates both the upper, inner and lower pectoral muscles. This becomes crucial when you are training in an abbreviated manner.