# How come Friel and Coggan vary so widely on 'Zone 2'?

• 11-13-13, 12:00 PM
GeoNLR
How come Friel and Coggan vary so widely on 'Zone 2'?
Example - LTHR = 172

Coggan Z2= 118-143

Friel Z2 = 141 - 152

I'm going to say that Coggan's method appears to be more of a 'Baseline' where Friel's seems to actually fluctuate in line with your LTHR.

For me 130 HR is NOT zone 2.5 ... 146... yeah... that seems legit. Funny that they both seem to agree on the top of zone 3 (Coggan 162, Friel 160)...

Thoughts? There is a big difference between 130 and 150!
• 11-13-13, 12:21 PM
Creatre
If you are taking HR serious enough to where 5-10bpm worry you, you need a power meter. 5-10bpm can be affected by a great deal of things, and your HR can fluctuate that much between each ride just because of fatigue, weather, hydration, etc.

It's just a guideline. Take it as such, don't take it as a end of a cliff at the end of the zone.
• 11-13-13, 12:34 PM
echappist
Quote:

Originally Posted by Creatre
If you are taking HR serious enough to where 5-10bpm worry you, you need a power meter. 5-10bpm can be affected by a great deal of things, and your HR can fluctuate that much between each ride just because of fatigue, weather, hydration, etc.

It's just a guideline. Take it as such, don't take it as a end of a cliff at the end of the zone.

this

effort that may be 150 bpm one day may be 140 bpm at the end of a training block
• 11-13-13, 12:40 PM
mattm
Quote:

Originally Posted by GeoNLR
Example - LTHR = 172

Coggan Z2= 118-143

Friel Z2 = 141 - 152

I'm going to say that Coggan's method appears to be more of a 'Baseline' where Friel's seems to actually fluctuate in line with your LTHR.

For me 130 HR is NOT zone 2.5 ... 146... yeah... that seems legit. Funny that they both seem to agree on the top of zone 3 (Coggan 162, Friel 160)...

Thoughts? There is a big difference between 130 and 150!

• 11-13-13, 12:43 PM
johnybutts
Cause Freil drinks his coffee before he rides and Coggan after.
• 11-13-13, 12:53 PM
GeoNLR
I have one... and if you got the impression the '5-10bpm worry me' than you don't even want me to talk about power numbers! haha
• 11-13-13, 12:57 PM
Ygduf
hr is too variable, at least for me. if I rest/ride easy Thurs/Fri and do something hard Saturday, I will see 180s. Same hard effort on Sunday I will see 160s.

My threshold HR drops from around 182 to 167 after 1 250+TSS long day.
• 11-13-13, 12:57 PM
Jandro
Quote:

Originally Posted by GeoNLR
I have one... and if you got the impression the '5-10bpm worry me' than you don't even want me to talk about power numbers! haha

Sounds like you're answering your own question, in that case (with a side of hand-wringing). I learned quickly that HR was way too variable to use as a strict training metric.
• 11-13-13, 01:09 PM
MDcatV
just ride between 141 bpm and 143 bpm and you're all set:thumb:
• 11-13-13, 02:24 PM
asgelle
It's not only how zones (or levels) are defined, but how they're used.
• 11-14-13, 10:06 AM
When I'm riding and my ipod starts playing "***** Cat" by Elton John, my HR jumps 10 beats.
• 11-14-13, 10:07 AM