Your core muscles are more than just your abdominals. And training your core gets you more than just a lean midsection. Your core is most of the muscles that aren’t your arms and legs. This includes your low- and mid-back, hips, pelvis and glutes. It acts as the link between your upper body and lower body, provides stability for your spine, and controls your balance. Research shows that older adults with strong core muscles have better functional performance, better balance…