The net names suitable for fitness can be iron muscle, iron waist and abdomen, fitness madman, muscle boy, muscle beauty and so on. These net names are all related to fitness, sports, physical fitness, etc., which can well show personal fitness characteristics and health concepts. On the social media platform, choosing such a screen name can attract more like-minded fitness enthusiasts, communicate with each other, learn from each other and encourage each other, thus improving their fitness level. In addition, fitness itself is a sport that needs persistence and hard work. Choosing a suitable screen name can also motivate yourself to keep exercising harder, so as to achieve better fitness effect.