Too much arousal in an athlete can lead to
a. a physical and mental state in which injury is impossible.
b. no change in his or her athletic performance.
c. increased muscle tension and attention deficits, thus decreasing performance.
d. decreased muscle tension and attention gains, thus increasing performance.

Explanation:

Arousal is a double-edged weapon because can excite or freak out the athlete, causing tension in his or her muscles and causing attention deficits, having sort of a tunnel vision about the game. As a result, the athlete performance will be decreasing because is gonna be distracted and have a sense of being tired.

nope, but i have cleaned my brush in my cup of not as potentially harmful but nevertheless, very upsetting for scottish/british folks. especially if you've used the last teabag for it

explanation:

there could be something in that . . i am indeed an old scottish man!

there's a bit of bolshie-ness with it too though. i won't let go of the old ways . . tea and whisky . . whether the young whippersnappers like it or not!