Is there a way in Garmin Connect to analyse your run speed average vs heart rate average over weeks & months etc? To see if you're gradually getting faster at lower heart rates?
Thanks
Check Reports → Running → VO₂ Max.
VO₂ Max is an indication of your cardiovascular fitness and should increase as your fitness improves. VO₂ Max is the maximum volume of oxygen (in milliliters) you can consume per minute per kilogram of body weight at your maximum performance. Your compatible Garmin device uses heart rate and exercise data to estimate your VO₂ Max.