The resistance band track start knee raise is a great exercise to build explosiveness and strength in your legs and glutes. This exercise is also great for hip mobility and balance. Learn more about properly executing this exercise with the video above.
Regression
Make this exercise easier by simply tapping your foot, instead of the full knee raise portion of the movement.
Progression
Make this movement more challenging by adding a small hop during the knee raise portion, or moving further away from the anchor point.