If you have a specific niche market (and you should), your marketing should reflect that market. There are two types of pictures that I see used in personal training, health club, and fitness studio marketing pieces that got me started on this topic.

1. Pictures of empty equipment. A picture of just equipment may show what you have for features, but doesn’t show who you serve. (How will people looking for a place to exercise determine that “people like me work out here”?) In fact, a photo of equipment only can be confusing and intimidating to those not familiar with the pieces.
2. Inappropriate stock photos There’s a great deal of stock photos that, while they may be attractive photos with attractive models, do not reflect your target market.  Always ask yourself, “Are these people someone my target market will relate to?” 

Use your own staff and clients if you can, because, (of course) that would be the most representative. However, if that isn’t possible, be very selective when choosing a stock photo. Make sure it will allow your target market to make a connection with the people in the picture. (Note: all photos are stock from Canva.com)