Roger Has Joined the New Fitness Club in Town and Is

Roger has joined the new fitness club in town and is very excited about his plan to get in shape. He knows he needs to increase his cardiovascular fitness as well as lose a few pounds. Which of the following situations might have the strongest influence on Roger, causing him to fail?

A) lack of support from his family and friends
B) his busy schedule
C) his general dislike of physical exercise
D) his feelings that he can't do it