The lower abs are the most difficult core muscles to define because they are the deepest in the abdominal wall. “That’s why it’s the hardest muscle to activate,” Makato Robinson, who has more than 30 years of experience providing fitness training, from Midtown Trainers, says. It’s important to remember that spot-reduction is not a possible fitness goal. Fat cells are all over the body, not just in one place. That’s why trainers like to say that muscles are made in the gym but six-packs are made in the kitchen. “You will see a difference in the abdominal area, if you focus on the right nutrition and cardio training,” Babidiye Robinson, also from Midtown Trainers, adds. And if you do effective exercises.