1, Fitness superfine product: The nickname Fitness superfine product expresses a person's enthusiasm and professional knowledge for fitness. It's a challenging and fulfilling nickname. It conveys a positive and healthy image, which makes people feel that this person has good strength and experience in fitness.

2. Fitness Little Monster: The nickname Fitness Little Monster has some humor and self-mockery, but it also reveals a person's determination and perseverance in fitness, suggesting that this person will make more efforts and sweat in the process of fitness, but at the same time, it can also find fun and motivation.