1. fitness club: the market of fitness clubs is saturated and the competition is fierce. The new club should be differentiated in terms of service quality, fitness facilities and curriculum setting.

2. Sports equipment sales: The competition in the sports equipment sales market is also fierce. New startups should attract consumers by finding new sales channels and innovative marketing methods.

3. Sports training: There is a great demand in the sports training market, but the competition is fierce. Start-ups should provide high-quality training services and try to attract enough students.