If you skim read
Effect of Five Bench Inclinations on the Electromyographic Activity of the Pectoralis Major, Anterior Deltoid, and Triceps Brachii during the Bench Press Exercise, by David Rodríguez-Ridao et al
you could quite correctly, I suppose decide that to build a good chest, you need to press at various bench angles. There are lots available; However to a review of the conclusion leads you to just 2 angles, horizontal and 30 degrees.
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