Check out Nick Singer, owner of FITology, featured in the following articles
https://www.womenshealthmag.com/fitness/best-butt-exercise
http://dcrefined.com/sports-fitness/tips-tricks-to-prepare-you-for-a-new-workout-class
https://www.womenshealthmag.com/fitness/best-butt-exercise
http://dcrefined.com/sports-fitness/tips-tricks-to-prepare-you-for-a-new-workout-class