Mariya Khan | Peak Performance Coach on Instagram: "Day 17/100 _ Want a flat stomach without workouts? This one daily core-engagement practice can visibly reduce belly inches in 2 weeks; no crunches, no abs routine, no gym dependency. When you keep your core gently engaged all day, you don’t just sculpt your abs, you build stability, posture, confidence, and emotional resilience. Science backs this: Your gut (enteric nervous system) directly communicates with your brain through the gut-brain axi