In this episode A&D takes a tour of World Marathon Majors and also answer listener questions on various runing topics.  * World Marathon Majors * Performance of Indian Runners * Listener Q&A - Pre-race fueling - Strength Training  - Speed vs. Endurance - Uphill training - HR Zones Join RunStrong42 telegram channel  https://t.me/+FcOgksU0A_M4MTc1

Heart Rate Variability or HRV is a well-known measure outside sport for a long time.  However in the past, it required ECG to find HRV.  In the recent times, it has become more accessible because of wearables like those from Garmin, Whoop, Apple, Oura etc., HRV as a metric is super useful for runners, as it is linked to parasympathetic nervous system (PNS).  PNS is responsible for rest and recovery.   In this episode we explore HRV What is HRV? What does it mean for runners? How is it different from resting HR? How does one measure it? How can we use it in training? Here are some HRV related resources, that we've found useful. Garmin GPS watches that support direct measurement of HRV  Garmin ConnectIQ app for HRV measurement in older watches HRV4 Training - Smartphone App for - measuring HRV without any additional sensors, and tracking training load/recovery to tune training HRV in response to exercise Race Anxiety and Effects on HRV