I currently workout 3~4 times a week and take a caffeine pill before lifting. It has around 2 cups of coffee worth of caffeine, and I was wondering if that would have any effect on my gains? I do PE before any weight lifting.
Caffeine is a stimulant so it may add a bit to erections.
Don't drink too much though, and no loads of sugar, cream or whatever. Just drink it black.
Caffeine can affect the body and brain in a number of ways. While it is most commonly used for alertness and mental focus, caffeine consumption does have other possible side effects that should not be overlooked. Blood vessel constriction, also known as vasoconstriction, is one of these potential side effects.
Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation, the widening of blood vessels. The process is particularly important in staunching hemorrhage and acute blood loss. When blood vessels constrict, the flow of blood is restricted or decreased, thus retaining body heat or increasing vascular resistance. This makes the skin turn paler because less blood reaches the surface, reducing the radiation of heat. On a larger level, vasoconstriction is one mechanism by which the body regulates and maintains mean arterial pressure.
So in theory as good blood flow is a must for PE then caffeine couldn't be a positive contributor, infact it has to be negative.