So I got about 4 hours of sleep last night because I was studying for this test I had this morning at 9:30. To make a long story short, I had an average to poor workout mainly because I was just exhausted. Why is it, that now when I'm sipping on my protein shake post-workout that I feel energetic and like I could go back to the gym and have a better workout.
I'm just curious, because it's kind of pissing me off. Is it hormonal release?