Maria-Teresa Solomons demonstrating the Uddiyana Bandha exercise in the video below, an abdominal tonification and purging exercise used in yoga for hundreds of years, recently adopted by freedivers to improve the elimination of air from the lungs, enabling the ribcage to flex and compress more at extreme pressures at depth. Don’t know if pool swimmers can use it for anything, other than the obvious WTF-effect. Via freedivers.net
