The resistance band spiderman plank helps with posture, aligning the body, and strengthening the core in a completely different way than your typical crunches would. This is also a great move for improving hip mobility. Learn more about properly executing this exercise with the video above.
Regression
Make this exercise easier by removing the leg movement portion, focusing solely on holding in the high plank position.
Progression
Make this movement more challenging by moving further away from the anchor to increase the tension on the Slastix.