Apollo is a patent-pending AI software platform that integrates with connected hardware to deliver physiologically-reactive vibration, demonstrated in a double-blind randomizedplacebo-controlled clinical trial, to improve resilience, as measured by heart rate variability, and performance under stress by up to 25%.Using physiological measurement and environmental data, Apollo identifies each users stress baseline to automatically deliver tailored vibration patterns that help the body and brain adapt to and perform under stress in real-time. Apollos reactive personalized vibration patterns work by enhancing activity in the autonomic nervous system.This proposal aims to test the feasibility of Apollo TVS delivered via the Apollo wrist-wearable to augment performance under and recovery from stress in elite military members by optimizing autonomic nervous system (ANS) activity. In collaboration with the Institute for Human & Machine Cognition (IHMC), the Apollo Neuroscience research team will assess changes in neurophysiologic and blood biomarkers of stress, recovery, and performance after using the Apollo wearablefor 4 weeks.