Sophie Herzog is the Owner and Co-founder and primary performance analyst at the MRYA center for athlete development. MYRA institute: https://www.myracad.com/ Koopcast on HRV https://www.myracad.com/articles/the-athletes-career-insurance-implementation-of-monit oring-tools-to-prevent-underperformance-in-sports Sign up for CTS Coaching-https://trainright.com/coaching/ultrarunning/ Subscribe to Research Essentials for Ultrarunning-https://www.jasonkoop.com/research-essentials-for-ultrarunning...