New compare page with power vs HR chart

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34

Do you think this could be used to ascertain relatively accurately the LT1 and LT2 points by deflections in the linear power/Heart rate line

35

Hmm. Not sure actually. I googled a little and found a paper that says no:

https://www.researchgate.net/publication/51646555_Analysis_of_Heart_Rate_Deflection_Points_to_Predict_the_Anaerobic_Threshold_by_a_Computerized_Method

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36

Thanks Just a thought really as it would save an awful lot of testing if it did.

37

1 minute segments sounds kind of short- I wonder how this graph would look if it were, say 3-4 minute segments.

EDIT: the rationale being, if I did a ride at easy endurance and did a 1 minute max interval every, that ride would give inflated PWR for a given HR, or generally for efforts that are usually short

38

You can see the 1 minute segments on the ride power page on the first 2 decoupling charts. These are adjusted for HR lag which helps with your 1 min max effort case. Those 1 min max efforts will also have high power and fall into the non-linear part of the curve. So for the under threshold range is probably still good.

39

I agree, I don’t mean to criticise, just brain storm- this stuff is exciting :wink:

I was trying to do something similar a while back. I had some ideas about how to get good data, but could not verify due to lack computing skills… One idea was to do linear regression on a per interval basis and only accept values, where the slope of HR and PWR data was in a limited band, as filter

40

Tx for the input on this topic! It discards minutes that are not 100% moving but thats the only filter currently. Open to any ideas on how to clean up the data more.

41

I love the idea of you adding some cadence analysis - I’ve often wondered what the most efficient cadence is for any given power output. As well as efficiency I’d also be interested in performance - so what cadence was I hitting at my best 1m, 5m, 20m power ranges etc. or any other way of analysing this data.

Keep up the great work!
Thanks, Stephen.

1 Like
42

I have added cadence to the hover over.

43

That’s great! I think over time this is going to be pretty useful!

44

It’s not that much LT points than VT points, these points are defined with change in ventilation.

45

First and foremost: Great Stuff @david!
I was trying to create a chart where I can see my season power best and compare it not to the last season as a whole but to the exact same time one year ago. I typically create my seasons to start in November. When I’m looking at my current and last season, I can compare the both very well as everything is said and done for this year. However, when I will compare my power curves in December, the progess is not really visible. Is there any way I can see my season power bests compared to last years power bests at that time (eg. december to december, january to january and so on?)
Hope this makes sense :blush:

46

Tx. I have “season match” on the todo list which is what is needed. It’s not too hard to do.

47

I just noticed that on my Power v HR ‘Compare’ graph, when I filter outdoor rides only the 2020 line disappears - as if there was no outdoor data.

This is a bit odd, as the 2020 Indoor/Outdoor graph is different to the Indoor only one, so there is clearly Outdoor data in there. I also did a lot of outdoor riding in 2020 so I know the data exists!

48

Can you please point me at an outdoor ride of yours so I can investigate. Tx.

49

Sent you a message with one.

50

First: great tool indeed. easy to compare YoY numbers (vs feelings). @david Is it possible to use w/kg instead of simple Power?
thanks
Gabor

51

Tx. For which chart in particular?

52

Hrmax% vs Power

53

Ok I will have a look at that.

1 Like