Jean Hall | Class and Course Library Recordings › Fortresses of Energy: Mixed. 61 minutes Image 1 of 1 Fortresses of Energy: Mixed. 61 minutes £12.50 A flow class exploring hands & feet as responsive fortresses of energy! All welcome. Purchase Download Added! A flow class exploring hands & feet as responsive fortresses of energy! All welcome. You Might Also Like Quick View Filling & Emptying · PART 2: MIXED. 60 MINUTES £12.50 Quick View Effort & Ease: Mixed. 80 minutes £12.50 Quick View Cakra Vinyasa: Strong/Mixed: 92 minutes £12.50 Quick View Spinal Mobility: Strong/Mixed. 96 minutes £12.50 Quick View Energise & Harmonise: Mixed/Strong. 78 minutes £12.50