The dorbarre reverse lunge with tap is a great exercise to build strength in the legs and glutes while increasing flexibility in the back. This exercise can also improve overall mobility and balance. Learn more about properly executing this exercise with the video above.
Regression
Make this exercise easier by not tapping all the way to the ground (ie: not going as deep into the movement).
Progression
Make this movement more challenging by adding a small hop at the top of the movement, or performing more repetitions.