If you want to improve your posture and strength, focusing on your midsection is key. Our latest article breaks down various ways to perform master the plank plank for maximum results. To keep seeing progress, you must introduce new challenges to your abdominal muscles. This is why professional athletes incorporate multiple types of planks into their conditioning programs. Adding arm or leg lifts creates an asymmetrical load, which is the ultimate test for your deep core strength.(Image: https://www.istockphoto.com/photos/class=) Quality always beats quantity; even thirty seconds of a difficult variation with perfect technique is better than minutes of poor form.(Image: https://www.istockphoto.com/photos/class=) Whether you are a beginner or an advanced athlete, these variations offer something for everyone. Check out the full breakdown of these 15 moves to start transforming your core strength today.