Summer is right around the corner — and if that alone isn’t enough to get you back in the gym, this just might.  A new study from Pennsylvania State University suggests that working on your six-pack may strengthen your core and give your brain a boost. “Our research explains how just moving around might serve as an important physiological mechanism promoting brain health,” corresponding author Patrick Drew, a neuroscientist, said in a press release .  New research suggests that abdominal exercises may offer the brain benefits similar to those seen during sleep. AntonioDiaz – stock.adobe.com In the study, Drew and his colleagues advanced imaging techniques to watch the brains of mice as they walked on treadmills with their heads held still. They observed that just before each step, the animals’ brains subtly shifted inside their skulls. The change appeared to coincide with the moment they tightened their abdominal muscles, which helps initiate movement.…