Researchers at the University of Kent in the United Kingdom asked two groups of volunteers to play puzzle games and watch documentaries about sports cars, and then asked them to perform indoor cycling endurance tests. As a result, the first group members who thought they were exhausted were more likely to give up than the second group. However, the researchers found that there was no difference in blood pressure, oxygen consumption, and cardiac output between the two groups of volunteers.
Which of the following options can be derived?
Manual labor can stimulate the potential of mental workers.