It starts about 130bpm and rises to about 140bpm over @40mins.
Is it an indoor turbo session? If so, could be to do with a bit of overheating? Have to say this looks pretty normal to me.
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If the shed counts, do get a bit of a sweat on so that could be the case. I hadnāt considered the heat element but that makes sense now. Cheers
Agree with the above, nothing to see here. It drops down nicely at the end when i assume you were cooling down.
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If youāre interested in applying the science to it, with an HR drifting from 130 to 140 over the ride, thatās a 7.6% increase, which is very slightly ādecoupledā but not much. In plain English, youāve got an oppotunity to do a little more aerobic work on the bike, but the gains will be soon diminishing, and youāll need to be shifting your focus to adding in anaerobic sessions too if you want to keep improving.
Google āheart rate decouplingā if you want to know more.
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Great, thanks for that. Monday is usually a fairly easy session after the longer weekend efforts. Today Iāll do something like a sweet spot session and Thursday will be shorter harder intervals like 5@105%.
Agree with everyone else. I had also just assumed that it was your body warming up.
This is a recent 2x20 of mine where my heart rate also creeps up during the intervals
Can also report back that my bottom bracket didnāt creak this morning. Seems Gorilla glue may have been the trick. 
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Yeah, I would definitely expect to see that sort of pattern in a 2x20 (Iām assuming youāre around the 90+% FTP for those).
My question was more related to the fact that it was quite an easy session at 70% so didnāt expect it to climb as thatās kind of an āall dayā power output.
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Doing run to and from work today.
9.77 miles in and then it will be at least 10 on the way home (slightly different route)
7:53 pace on the way in, with 9:15 / 0:45 run walk
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Itās called ācardiac driftā. Perfectly normal in most circumstances.
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Six hours for @Matthew_Spooner on the IM Lanza bike course today.
I wonder what his thoughts areā¦
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17km split run.
11km this morning (brrr) at 5.18 pace and 6km just now at 5.21 pace
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10 mile run home had to be a bit earlier due to work, so lunch was still bouncing around.
6 miles in my knee starting being quite painful. Itās an old injury where tightness causes my knee cap to mid-track.
Last 4 miles were painful with a fair number of stops.
Same pace as this morning
7:53 per mile.
Currently on the foam roller
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Anyone pulled their calf muscle? How long was recovery? I pulled it a month ago and itās still not feeling 100%. Feels tight and thereās a small pea sized lump thatās slightly tender to touch. Donāt want to push it too hard in case I make it worse again. Booked into physio but havenāt been yet.
Iāve had a calf strain go a few times and it depends on the severity. Usually taken me around 6 weeks before I could start to do some light running, and thatās with a lot of physio and stretching.
I had planned on doing a turbo session. But I needed to be home for the kids and left late so absolutely caned it to the train station to get my train. Bloody knackered after that. Felt like 20mins at 105% FTP so will chalk that up as a work out. No warm or cool down though, old school.
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Thanks. Iāll keep going steady on it and see what physio says. I have a hilly HM in a month so need to get the miles in ASAP!
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10x100m swim felt like shit, then a 4x1500m tempo session that felt great!! 
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Posted in other thread
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