In Jim Wendler's 5/3/1, you're expected to train three or four days a week. Each workout is centered around one core lift – the parallel Squat, Bench Press, Deadlift, and standing Shoulder Press. Each training cycle lasts four weeks. The philosophy behind is great gainz over a long period of time. It's slow but steady and it's adviced to do more than one cycle to see results. Choose your assistance work to target your percived weaknesses.