Adderrall doesn't increase stamina it just blinds our perception of stamina...
It increases focus by stimulating brain cells...the stimulating of brain cells kill boredom, which allows you to not only focus longer but harder as well since learning/studying/competing also stimulates the brain, it's magnified
Come down is awful though, you're left feeling dirty, bored , and you can't sleep...I've been up 48 hours once, and it wasn't my choice
I will say though, the combo of coming down from Adderrall and smoking weed is incredible
I could see why an athlete would use it. But its dangerous as fukk to play football on Adderrall...But I guess at corner it wouldn't be too bad... Could be using it just to study playbooks tho, I'm sure any athlete can learn a playbook from top to bottom with Adderrall ...