What can Michael's belief about the effectiveness of a piece of equipment be identified as?

Michael's belief about the effectiveness of a piece of equipment can be identified as a fitness fad because it indicates a trend or perception that may be popular or widely accepted at a given time, but might not be backed by scientific evidence or long-term effectiveness. Fitness fads often revolve around certain pieces of equipment or specific exercise regimens that attract attention due to marketing or social influence, rather than their actual results.

On the other hand, a safety plan refers to precautions and procedures to ensure a safe environment when engaging in physical activity. A workout routine consists of a structured program designed to achieve specific fitness goals, while an equipment manual typically provides instructions and guidelines for the proper use and care of a piece of fitness equipment. None of these options pertain to the subjective belief or perception of effectiveness that defines a fitness fad.