Rachel Lee is the founder and CEO of Ice Bath Boston & Breath in Needham, Massachusetts, where she offers one-to-one nervous system regulation coaching and corporate wellness grounded in breathing mechanics and cold water immersion. She has delivered more than 3,200 hours of one-to-one coaching, and her practice is a clinical selective site for Tufts University School of Medicine. She co-authored research in Frontiers in Physiology on measuring diaphragmatic breathing efficiency and holds a pending patent for the Downshift Score, which quantifies autonomic nervous system downregulation. Her approach comes from her own recovery: nervous system regulation is a learned skill, and adaptive coping requires a full range of tools.