View Single Post
Old 07-04-20, 06:37 PM
  #22  
Carbonfiberboy 
just another gosling
 
Carbonfiberboy's Avatar
 
Join Date: Feb 2007
Location: Everett, WA
Posts: 17,546

Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004

Mentioned: 106 Post(s)
Tagged: 0 Thread(s)
Quoted: 2976 Post(s)
Liked 899 Times in 682 Posts
Originally Posted by bikebikebike View Post
gotcha on that.
I have a Wahoo Tickr that pairs better with my Hammerhead Karoo on ANT+, and decently, though less stably with my iPhone6,
used to pair with the Karoo occ to cross check the GPS on the Karoo.
Interestingly the Karoo is ~2-5% less on routes, though GPS algorithms easily vary that much and it is also that much less than a drawn course on MapMyRide.

As I was talking myself out of a powermeter, I looked into the various metrics, laboratory quality thru subjective, and feel for me, the subjective RPE exertional rating, speed duration and distance were all I needed, and playing around with the calculated proxy VO2max and "FTP" on various sites were fine for me at this stage.

What I was looking for was a Respiratory Rate Meter that might log that data, as I log the other training mishagas.
It has been fun looking at the correlations between the "gilt standards" of VO2max , watts, and METS , seeing what are reasonable proxies with stable values for use and comparing mine.
I dodged Cardiac rehab, and wanted to see where its (rather fanciful) metrics fit in, as well.
Plus I am ( like many older folks) on beta blockers that further screw up using heart rate as a metric.

RRM are to be had . There is a good paper reviewing their use in monitoring pediatric pneumonia
https://doi.org/10.1164/rccm.201711-2233CI that lists what they do.
I haven't found anything that costs less than a good powermeter , designed for hospital use, as of yet.
I think they may be as good if not better than HRM.
and it would be an interesting comparison to match it with "5 min of huffing" to see if it out performed simple timed intervals with subjective endpoints.

Like the OP , there a a lot of folks who make use of a game of stats to help motivate themselves, and it is always fun to calibrate that with a bit of science.
You don't need a respiratory meter. All you need to know is what the breakpoints at AeT/VT1 and AnT/Vt2 feel like so you know about where you are in the effort continuum. That'll sub for the HRM, which I agree won't do you much good. The breakpoints are sharp enough to be quite detectable with a little practice. For the game of stats, in your case there's no substitute for a PM. Might as well get one. There are $300-$400 wheels with Powertap SL+ hubs on ebay. I scored one of those hubs out of a wrecked bike and built a wheel on it. Works great with my Garmin 800.
__________________
Results matter
Carbonfiberboy is offline