When working with women or specific groups
I would say that “core” definitely captures people’s attention and will get them in the door. That has been my experience with group fitness over the years. I teach a specific core class that has remained popular and brings in new people each time, even when other classes have gotten smaller. I also teach a interval class everyday over the lunch hour, and whenever I ask my class what they want to work on- the answer is always “abs.” I feel like once I have them in the door with a catchy title or buzz word like “core,” it’s my job to do a better job expanding on what exactly the core is and getting my students to think outside the “crunch box” to do some other great core conditioning exercises for stability and mobility. I think a lot of people have a misperception of what the core is and what good ab work is, so sometimes it can be a challenge to get people to realize there’s other stuff out there above variations of crunches.
If you’re working with post-natal clientele, I would definitely make sure they’ve been cleared by a physician to exercise. I think a lot of moms, myself included, want to get back to pre-baby shape sometimes at the expense of good sense and giving their bodies time to heal. At our gym, I had a girl come in 3 days post c-section to her workout class… yipes.
Best of luck to you!