Final answer:
The belief that a piece of equipment will quickly sculpt abdominal muscles can best be identified as a fitness fad.
Step-by-step explanation:
The belief that a piece of equipment will quickly sculpt abdominal muscles can best be identified as a fitness fad. Fitness fads are trends or popular beliefs that promise quick and easy results in fitness or weight loss, often without scientific evidence or long-term effectiveness. In this case, Michael's belief may be based on marketing claims or unrealistic expectations, rather than sound exercise principles.
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