I find looking at this really depressing because after a big block of training it always shows me as being "less fit" than I was before I started. I think the occasional periods of runs without HRM chest strap (normally waiting for a new battery), and therefore terrible HR data from the watch throw the calculation out and the score associated with a hard training run doesn't come close to the score given to an easy run with bad (hugely over-reading/cadence locked) HR data so when I have good HR data everything looks "easy" to Strava.
e.g. two different 5 mile tempo runs, one has a training impulse of 830 and the other 92
Generally I know when I've been training well and start to see and feel the results so ignore Strava
I find looking at this really depressing because after a big block of training it always shows me as being "less fit" than I was before I started. I think the occasional periods of runs without HRM chest strap (normally waiting for a new battery), and therefore terrible HR data from the watch throw the calculation out and the score associated with a hard training run doesn't come close to the score given to an easy run with bad (hugely over-reading/cadence locked) HR data so when I have good HR data everything looks "easy" to Strava.
e.g. two different 5 mile tempo runs, one has a training impulse of 830 and the other 92
Generally I know when I've been training well and start to see and feel the results so ignore Strava