A strong core is useful–for things like arm balances and inversions, protecting and preserving a healthy spine, and, OK, you got me, looking svelte in your fall wardrobe. A foam roller, found in most gyms, is a simple piece of equipment with many functions, including killer core work. Here’s one of my favorite exercises.
The key is to pull your abdomen back toward your spine the whole time and go slowly. Balance will be challenging at first, but as your core strength improves, you’ll become more steady. And being strong and centered is a great thing to practice anywhere, with or without a foam roller.