Hit the gym today was intending on doing back and hitting shoulders tomorrow. It's day 4 and the S4 decided to kick in full swing today. Not only was strength up, but endurance kicked in today. The 2 days I consider the most strenuous are back and shoulders and I completed both in the same workout. I was pouring sweat bouncing from set to set not waiting over a minute between sets. I was getting some crazy stares, like wtf is this guy on. Amazing amazing workout. I didn't want to destroy my calorie count so after doing 2 muscle group workouts at the same time I skipped cardio.
Today I dosed 25mg in the morning on a empty stomach and 25mg preworkout. I couldn't tell a difference between the 25mg and 50mg preworkout so I'll coast at this dose for a week or 2 and see what happens.