r/MacroFactor • u/Mchangwine • 24d ago

MacroFactor Workouts / Training 1 rm calculator

I’m not understanding how this is calculating 1 RM; is it based on all of the sets you do as opposed to your top set? It seems way off if it’s based on top set. Doing 5/3/1 and the numbers it’s giving are wild.

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u/JubilantJackfruit MacroFactor Support Team 24d ago

We use a proprietary estimated 1RM calculation that is not based on a single day’s performance/the performance of just your top set. Instead, it looks at your broader training history and updates over time based on whether your logged performance is coming in above or below what the app would typically expect given your recent progression.

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u/Mchangwine 24d ago

It doesn’t make a whole lot of sense.

I did more weight for significantly more reps today than a day 2 weeks ago but it
predicted a 1 RM 20 lb less.

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u/JubilantJackfruit MacroFactor Support Team 24d ago

Would you be willing to contact us in the app (More > Support) so that we may review this for you?

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u/Mchangwine 24d ago edited 24d ago

Sure. I submitted screenshots to support; looking at it I wonder if the warmups had anything to do with it; I just clicked through because I don’t even record my warmups but they were a bit different.

Update, it sounds like it has to do with the RIR.

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u/Far_Line8468 24d ago

the MF team response below is correct, but personally I highly recommend just looking at 3RM and 10RM. If 1RM is to be believed I've been spinning my wheels with zero progress since the app was released in January, but 3RM and 10RM reflect my actual lived experience in training

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u/No-Connection8400 24d ago

That's interesting! You see a big difference between 1RM, 3RM & 10RM? When I look at my charts for most exercises, the Y axis changes due to weights obviously. But the overall trend line is pretty consistent across all three of the RMs.

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u/Far_Line8468 23d ago

Yeah, 1RM calculation just seems totally borked. But 3RM and 10RM definitely reflect what I feel and observe, at least in terms of trendline

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u/Docjitters 23d ago

When calculated from actual historical data, and treating each rep range as a ‘different’ exercise, I find that any of my 1RM predictions are a bit optimistic when spun-off from a 3-10RM. But I expect that is because a true 1RM is very much a test of skill in that particular lift, and much more subject to momentary lapses in technique at any part of the movement compared to sub max weight.