Vo2 Max Testing & Metabolic Rate Assessment & Nutrition & Firefighter Fitness Wellness Xtreme O2 is the Bay Area's first and only "Mobile" Performance Testing Company offering VO2 and Metabolic assessments for the Endurance Athlete as well as the Beginner. We have initiated a comprehensive program based on scientific data offering complete training programs as well as nutrition. Xtreme O2 is striving to service not only athletes but general weight loss and over all wellness through education and awareness. with baybookmobileperformanceresearchsourcestestingxtreme