One of the most important things you can do is working on your core muscles (which knits together to create your waist). A solid core helps you lift, carry, sit, sit, run, jump, and lift a heavy box or sofa. A small toddler or a beloved pet? You’re using your core. Is it better to lift a heavy shopping bag or a heavy sofa? You guessed it: Your core will help you do it too. It’s never a bad thing to make sure you’re strengthening the muscles that help you with your regular workouts and daily life.