This is by far one of my most basic principles when planning my own workout as well as programming for my clients. Simple is better. Over-complication is one of the biggest problems plaguing the current fitness scene. We have flooded the market with so many ideas, gimmicks, and schemes that people are trying to incorporate way to much into their routines. Stick with the staples lifts that target all the basic movements of the human body. If you are wondering if you should do hack squat, leg press, front squat, one-legged squat, bulgarian split squat, and back squat all mixed in to your program my advice is they are all squats so just do squats. SImplicity is often the best answer.