I like that the have links to videos for strength training.
Appears to use DF1a or HRV to validate VT1
References to VT2 for training zones
Has rider profiling tests. I like this very much.
I’m trialing for 2 weeks for free just to see.
Cheers
Edit: Don’t be fooled by the basic interface, this app and all the resources around it have very interesting ideas, for instance: a protocol to assess recovery embeded in the recovery ride.
Overall it has a feel of detail and coaching individualization, unlike anything I have seen out there.
For VT1 you can ride with me and tell me about your day. Keep your front wheel next to my front wheel. In about 40 minutes, I’ll be able to tell you about what your VT1 is.
For this test, we’ll use progressive steps of exercise to pinpoint your lower threshold (i.e., aerobic threshold). For this test we use heart rate variability (HRV) during the test. Currently, our system is only compatible with Garmin for this determination, and in order to achieve this, your watch must be adjusted in the settings to enable this. If you have a Garmin watch (i.e., 945), go to settings - physiologic metrics - log HRV - turn on - then use the back key to get out of the settings. You’re good to go. Power will also need to be visible to you throughout the session.
Equipment: Power meter or stationary erg recording power, HR monitor set to collect HRV
Protocol: After a short warm-up, begin riding at 100W for 3 min, and increase by 25W every 3 min. Continue until rating of perceived exertion reaches 8/10. Don’t worry if you can’t get through all the steps written out - most won’t. Cool down.
Thanks - not shocking that they are only using the data from Garmin, but makes me wonder what specifically they are relying on in that data set that other HRMs aren’t capturing or perhaps are just sending in a different manner
Yes, interesting. The description is ambiguous to me. Maybe they meant Garmin watches only. The have running too. I can see a case there. Like no Apple Watch.
they’re going to use dodgy wrist pulse data and your dodgy shimano power meter to guess what VT1 is. Not based on your wrist-pulse-derived heart rate…nope, not sketchy enough…but based on your wrist-pulse-derived heart rate variability.
Trust me, my method is probably 20% more accurate. But I’m probably going to need an e-bike to do it properly.
(I forgot to add, you have to pay for the GIGO service.)
That’s why I was asking. I’m very interested in the science and validity of their approach. At best I’m an hrv skeptic so I was hoping I could test their approach in the free trial, compare to what I’m fairly confident my lt1 is. Unfortunately no Garmin for me
The Blog on that site is really excellent! Well worth the reading.
They do have the slowest loading blog page in the history of the internet, though, so there is that. I remember the days when dial up was a thing…this is taking me back.
I’m guessing because Garmin x30 and x40 bike computers record HRV. All my 530 fit files have HRV data embedded in them, starting from when I bought it circa September 2019. Maybe a year ago I used a Python script to go back and analyze HRV data and roughly estimate DFA1 (roughly because I have no progressive step workouts at lower threshold).
I did a couple of ‘vaguely similarly shaped’ curves, and it appeared they fixed it to 5-min power on the left, and I wasn’t sure where they fit to the knee of the curve on the long duration.
That was perception and 90-day power curve, here is the steady endurance portion of a ride from 4 days ago:
HR slowly rising and completely in sync with slowly rising power
could have been talking to someone
Three months ago my HR would have been trending around 138-142bpm at that same power, this one and last several have been on warmer days and trending around 133-137bpm.
Some interesting ideas that I haven’t previously used as a lens to view my data.
Looking more into it, perhaps Xert will be out of business soon or it will be even less relevant than today. They were really slow to develop and now they are left way behind.
