If you're looking for a low-impact, effective way to target your core, it's a smart idea to invest in a Power Glider ($60). This tool makes it easier to perform core exercises without straining too hard or sacrificing form. Plus, it won't take up a ton of space, making it the perfect at-home workout accessory, especially if you're living in a small apartment.
Try this routine from celebrity fitness trainer Ramona Braganza to start seeing the benefits of a Power Glider. Each move focuses on shaping your core in addition to strengthening your lower back. Start by doing each move without the Power Glider first as a warm-up, then do the entire circuit twice with the Power Glider for a fast and results-yielding workout you can squeeze in any time.