Kristina Macias is a breath, strength, and performance coach who helps speakers cultivate presence, clarity, and resilience through intentional breathwork. With a Bachelor of Science in Exercise and Sports Science and a Master of Science in Strength and Conditioning, Kristina brings a highly educated and evidence-based approach to the physiology of performance.

For over 15 years, Kristina has coached individuals and teams across a wide range of environments—from high-performing executives to tactical professionals. She has taught breath training in firehouses and police departments, classrooms and college campuses, corporate offices, and youth programs. Her work blends scientific insight with practical application to help clients regulate the nervous system, project confidence, and sustain energy under pressure.

For the past 3 years Kristina has built and managed the Metabolic testing Lab at Jyzen in Mill Valley, where she conducts VO₂ max and metabolic testing to guide precision performance and recovery strategies. Her coaching integrates biomechanics, breath mechanics, and behavioral awareness to support long-term health and vitality.

At Lange International, Kristina helps speakers access the power of the breath to refine their vocal strength, reduce anxiety, and unlock a more grounded, authentic presence in front of any audience.