Jessica Arevalo is a fitness coach with over a quarter of a million followers on Youtube. Always looking to take her fitness training to another level, she and her friends Jen and Britney decided to travel to the Glute Lab in San Diego, California, where the owner, Bret Contreras put them through the paces.

In this video, the ladies demonstrate the exercises they endured that left them sore for the rest of the day. Check the video out here: https://www.youtube.com/watch?v=GVTxRZUskMQ