Kira McKeown instructs the following:
Power Hour is an abbreviated version of the 90 minute Southern Flow Hot Yoga class designed to build core strength and flexibility. (with less rest breaks)
Southern Flow is a flowing series of sun salutations, lunges, twists, balance postures, backbends, core strengthening, hip openers and inversions often referred to as Power Yoga. Designed to build core strength and flexibility while still maintaining focus on a meditative practice.