Came back to normal mileage this week (~45mpw) after a BIG illness- induced down week (16 miles) but every single run I’ve gone on, including a tempo yesterday, my Garmin race predictor for the marathon has gone down a few seconds (gotten slower). It’s not significant (was at 3:16:11 at the beginning of the week and is now 3:17:00) but why does working out normally make Garmin think I’m getting less fit?
It doesn't just go off your running... it goes off the sleep, HRV, etc. Being sick will affect those things.
Also I've found the Runalyze predictor to be better, plus you can fine tune it if it's off.
First off it's crap. Second who cares what it says. It works off other stuff as said but to improve predictors you basically have to run multiple events that "it" considers to be your race HR and pace over a 3 week period plus.
For most ppl I know garmin says "3:00 to 3:30!" or some bs, but they in fact run like 2:20 to 2:40.
PS I am not friends with slow ppl or those who do little mileage but I know dozens where it under reports. If your garmin predicts a time faster than you are then you're a terrible runner. (I only here those anecdotes online - I am not friends with them).
Ignore the predictor. It's way off for a lot of people.
Appreciate the reassurance. Historically my Garmin has been very accurate in predicting my HM and marathon times within a couple minutes but it used to over estimate my abilities and has only recently started to become a really close predictor
It told me I was going to run 33:45 for 10k the morning of a race in which I ran 33:19. It didn't update either; still reckoned I was in 33:45 shape the evening after the race.
It's a joke. If you race your workouts it gives too positive predictions. If you do workouts like they should be done, it's the opposite.
Wood-man wrote:
First off it's crap. Second who cares what it says. It works off other stuff as said but to improve predictors you basically have to run multiple events that "it" considers to be your race HR and pace over a 3 week period plus.
For most ppl I know garmin says "3:00 to 3:30!" or some bs, but they in fact run like 2:20 to 2:40.
PS I am not friends with slow ppl or those who do little mileage but I know dozens where it under reports. If your garmin predicts a time faster than you are then you're a terrible runner. (I only here those anecdotes online - I am not friends with them).
What?
Man_Moth wrote:
It told me I was going to run 33:45 for 10k the morning of a race in which I ran 33:19. It didn't update either; still reckoned I was in 33:45 shape the evening after the race.
Yeah exactly. I've been having the same issue with Coros. These smart watches seem to really hate ez running for whatever reason. I feel like it'll give me a low score when I run slow even if my HR matches, or even outperforms, the pace zones. I'm doing triathlon now so a lot of my running is done on tired legs/as the 2nd or 3rd session of the day. Even when I am fresh I've usually had a big session the day before. I went through 5k quicker in a workout with rest last week than what it was giving me for a prediction. It didn't adjust. It's annoying but you know how fit you are.
Get yourself an older model which doesn't show these useless things.
camilleeon wrote:
Came back to normal mileage this week (~45mpw) after a BIG illness- induced down week (16 miles) but every single run I’ve gone on, including a tempo yesterday, my Garmin race predictor for the marathon has gone down a few seconds (gotten slower). It’s not significant (was at 3:16:11 at the beginning of the week and is now 3:17:00) but why does working out normally make Garmin think I’m getting less fit?
At 65 it was predicting ridiculously fast times. I think it was registering the high V02 max, but failed to account for the fact that you can't generate/sustain the same level of power at that age.
It would also tend to see a rep session as not beneficial....
Version 35 wrote:
Get yourself an older model which doesn't show these useless things.
Or just ignore the BS they calculate.
My Garmin predicts my 5k time at 15:53 and a LT at of 6:29... 🤷♂️
Kvothe wrote:
Ignore the predictor. It's way off for a lot of people.
This.
After I ran a HM PB in 1:21:XX, the watch still predicated I'd run 1:31:XX.
It's crap.