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Fango925 t1_itmoabf wrote

Reply to comment by Regular_Zombie in [OC] Visualising 12 months of running with Strava by detalbruh

I'm a cyclist but I imagine it's similar in all endurance cardio sports - a lot of time training is spent in a lower heart rate deliberately. Somewhere like 80% of your training should be spent ~120-140bpm (obviously varies depending on the person.) Could be that they're slowing down to deliberately lower their heart rate in order to have better endurance/faster paces over time rather than a faster first KM

It's not always productive to be running as fast as you can

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detalbruh OP t1_itn4smz wrote

Yeah these comments and bang on - I researched / talked to some running friends and was not going to be effective to continue running at 4:30-4:40 if I wanted to build endurance and form to run a marathon.

The variation in runs is also correct - that was part of the mara training program. I guess what I found interesting was that my interval/fast runs in late 2022 were at a lower HR than late 2021, meaning at a rudimentary level my fitness had improved.

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