make sure you’re eating enough carbs and protein and consuming a decent pre-workout meal 30 mins to an hour before youre workout especially if it’s intense your body needs that for fuel to push through it. Or else without proper dieting you will plateau or drop in strength dramatically. And yea, give that muscle at least two full days of rest before working it again.

try to rotate body parts through out the week instead of bench two days in a row your muscles are fatigued