Abs are a very easy muscle group to develop, but the keyword is a muscle group. Your abs and core are made up of muscles meaning we have to train them like any other muscle group with progressive overloading, and training to failure. They’re such an easy muscle group to skip that’s why I always add them at the end of my workouts or if I’m feeling really lazy that day I’ll throw them in between my workouts that way I cannot leave the gym without getting it done. If you incorporate ab cable crunch

Nurse Fitness: Effective Floor Workouts for Busy Days