Considering the body of scientific literature to date, what effect do dietary supplements have on performance?
A) None have been shown to improve training or performance.
B) Only a few have been shown to improve training or performance.
C) The majority have been shown to improve training and performance.
D) Nearly all have been shown to have a small training and performance effect.
Question 2
Dr. Timothy Noakes estimates the performance enhancement associated with creatine to be ____ percent.
A) 1 to 2
B) 1 to 3
C) 3 to 4
D) 3 to 5