1 x 30min @290 = 167 HR
1 x 25min @270 = 180 HR
Don’t understand my heart why it is so high. Some days it’s fine others it goes through the roof…
You need to look at any and all factors that can influence heart rate. Here are a few from the top of my head.
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There’s a clear difference in time of day for each. Morning ones are often higher RPE and heart rate for many people (very true for me).
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Environmental factors? (temp, heat, humidity. etc.)
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Nutrition factors? (food, caffeine, hydration levels, etc.)
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Motivation? (ready to rip, rev’d up from music or other influences, etc.)
Edit to add: In case you think I’m someone else… For clarity, I am NOT Chad Timmerman (TrainerRoad’s Head Coach). I’m just an active forum member and big fan of TrainerRoad. #TheOtherChad 
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In addition to the factors mentioned above, you should also consider stress as a possible factor - work, family, bad sleep, travel, illness could all impact your HR
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Appreciate the replies. I don’t feel anything has changed as suggested above.
I will try and start later in the day and see if that makes a difference. Hardest thing is knowing what my HR is going to do before the workout.
I would just not worry about it. HR is interesting but I wouldn’t stress about it.
We don’t have a way to measure and predict what it will be in a given workout. And in most cases it doesn’t matter.
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Only issue I have is trying to hold a longer interval at such a high heart rate
Looking at your screenshots, the left one was done at 0900 and the right at 1700 which sort of ties in with @mcneese.chad’s point about time of day having an effect.
Try doing the workouts at the same time of day if you can and then compare.
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Time of day has a big effect for me on RPE and HR. Earlier means a harder perceived workout. Same for running as well when I do any of that.
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If you want to do something with HR, try to find patterns (like the influence of external factors
as @mcneese.chad mentioned), without patterns it’s only interessting when it’s consistent. Then, if you know what influences your HR, you might be able to see additional patterns that might indicate illness or too much or too little training stress.
But to draw conclusions, it’s requires a lot of tracking and analysing, so not sure it’s worth it
TerryR
Interesting thread however I have the opposite problem in that currently (one week), my HR is consistently low throughout my HR zones.
Background - male age 74 non racing experienced club rider, FTP 180, Max HR 160. Live in Ottawa so long winter of Indoor training.
Programmes October 2019 to date :
SSB low volume, SSP low volume
‘Normal’ average threshold HR 150 - 155
Current average threshold HR 149
The lowered threshold seems to be consistent throughout my HR zones. Have had this problem for a week now covering 1 outdoor ride and three indoor sessions.
Am feeling normally healthy both on and off the trainer with no stress issues. Any thoughts please anyone?
- Your FTP went up, so your HR fell off the zones a little bit
- Your heart is tired, since it is a muscle.
Could be, I did a ramp test Monday 17 Feb and FTP increased albeit by a measly 1% and followed with some heavy duty sweet spot / threshold. What do you reckon back off the intensity and maybe up the volume somewhat?
It’s a sign that higher watts are easier for you.
A good problem to have.
Next step: 310W = 154bpm? 
Sounds encouraging but sorry don’t understand, would you mind elaborating please. I just assumed my HR would increase toward the max over any given SS/threshold interval.
If your treshold in the workout is lower than your real threshold you are basically working in the sweet spot zone - for example: your threshold in the workout is set to 180W, but your real ftp is 200W (because ramp test can over or underestimate), then you are not working on threshold but on sweet spot zone, so your hr will be lower.
If you are under reaching your hr would not climb toward the max but stabilize during the workout. If your HR climbs toward the max on the long, steady intervals near threshold that the sign of working a little over your real ftp or lack of aerobic base and accumulation of fatigue during the workout.
Thanks, hope you’re right, coronavirus permitting training for Majorca in April. TerryR