There is no one-size-fits-all answer to this question, as the marketing strategies that are effective for a gym will vary depending on the type of gym you own. However, some general marketing tips include:
Creating a strong branding strategy, including a recognizable logo and tagline.
Developing marketing materials such as print ads, website design, social media profiles, and more.
Creating a referral program to incentivize customers to refer their friends.
Developing partnerships with other businesses in your community.
Running promotional events such as free trial days or discounts for memberships.
As you can see, many marketing strategies can be effective for your gym. Your marketing strategy should support your overall business strategy, which is defined by your mission statement, vision, and unique selling proposition.