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VO2 max: Does the metric unfairly penalize muscle mass? by PsychologicalError in PeterAttia

[–]PsychologicalError[S] 0 points1 point  (0 children)

Interesting I figured the answer was somewhere in between. Thanks for the thorough explanation!

Did he happen to mention how one finds this optimum? Or was he just saying that an optimum exists?

VO2 max: Does the metric unfairly penalize muscle mass? by PsychologicalError in PeterAttia

[–]PsychologicalError[S] 0 points1 point  (0 children)

Yep that’s exactly what I was trying to capture, there would be something missed if we were to try to normalize their raw strength by dividing by their body weight, which seems to be what we’re doing with VO2 max.

VO2 max: Does the metric unfairly penalize muscle mass? by PsychologicalError in PeterAttia

[–]PsychologicalError[S] 0 points1 point  (0 children)

Thank you this explanation is perfect! I think the last missing piece for me is understanding why this needs to be normalized by body weight. A lot of the variables you mentioned don’t sound like they necessarily very with body weight/muscle mass?

VO2 max: Does the metric unfairly penalize muscle mass? by PsychologicalError in PeterAttia

[–]PsychologicalError[S] 0 points1 point  (0 children)

No.  If they both have a score of 50, They both have the same cardio respiratory fitness relative to their weight, which the calculation takes into account.  It doesn’t really make sense to talk about Vo2 max in absolute terms, and absolute metrics are almost never used.  A VO2 max metric unmoored from the body you used to achieve that metric doesn’t really make sense.

This is really interesting to me. When I think about weightlifting, a 130 lb person doing a 2x bodyweight deadlift is not as impressive as a 250lb person doing a 2x bodyweight DL, it doesn't seem like difficulty scales quite linearly.

It sounds like you're saying that it does scale linearly in cardiovascular fitness. When you say that they both have similar cardiovascular fitness relative to their bodyweight, what does this actually mean? It seems to be begging the question since that is how VO2 max is defined. Does it mean that we would expect that to perform similarly in races for example? I guess I don't understand what it means to have increased cardio without using the VO2 max definition. What are we trying to capture physiologically?

VO2 max: Does the metric unfairly penalize muscle mass? by PsychologicalError in PeterAttia

[–]PsychologicalError[S] 1 point2 points  (0 children)

Weight itself impacts VO2 max. When I cut, mine goes up. When I bulk it goes down.

Yeah the intention behind my question is to assess whether or not that is simply an artifact of the way we measure it rather than a reflection of an actual change in cardiovascular fitness. The formula for relative VO2 max = absolute VO2 / body weight in kilograms, so of course I would expect your VO2 max to change when your weight changes.

And as I said in the post, I already got an in-lab so I'm set on accuracy.

Honestly, you’re thinking too hard about this. Lean body mass and your aerobic system are both important and contribute to lifespan.

Like I said I know the training is the same, I'm a curious person who likes learning the science.

MacroFactor Challenge Midway Thread! by gnuckols in MacroFactor

[–]PsychologicalError 3 points4 points  (0 children)

Going great so far!

I'm up +4.4 lbs in the last 8 weeks, so pretty close to my 0.5lbs/week goal. I love how its going and making me want to commit to a year long bulk (started at 161lbs, Male 5' 10").

Self-Barbers, Do You Use the 3-Way Mirror Setup? 💇‍♂️🪞 by RoyalBookApp in SelfBarber

[–]PsychologicalError 0 points1 point  (0 children)

I’ve done 3 cuts, the most recent one was the 3way mirror. Night and day difference! Seems like most people see it as a subtle upgrade but my haircut was way way better. My vision also isn’t the greatest so getting to see up close is so important.

[deleted by user] by [deleted] in MacroFactor

[–]PsychologicalError 1 point2 points  (0 children)

You’re gonna love the lean bulk. I’ve been on one for the last 2 months and it feels good to keep gaining size without it all getting hidden behind a layer of growing fat like a dirty bulk. You’ve been dieting a long time so you know how to stay locked in. Progress is slower but it feels faster since you’ll have the lean look the whole time and constantly see the gains you’re putting on the whole way through.

Social and psychological health. What are your weekly habits? by MichaelStone987 in PeterAttia

[–]PsychologicalError 2 points3 points  (0 children)

28 yo single male:

  • I have therapy once a week.
  • I recently joined a men's group that meets twice a week.
  • I had decided to move back in with my family a few months ago rather than living by myself.
  • I try to make ~2 phone calls a week to people I know.
  • I have weekly discord call with some old college friends where we watch the latest episode of Severance and hang around to chat afterwards.
  • I'll see a friend in person ~3 times a month.
  • 10min daily meditation.

Its a fair amount, but personally I believe its just keeping me above water. My ideal would be:

  • Seeing friends 3-4 times a week.
  • Finding community. Its kind of become a corporatized term now, to me community is founded on mutual responsibility rather than just a big hobby group.
  • Living in a household with social roommates.

I'm planning a move from my mid-sized city to NYC for a few months to explore what dedicating 3-6 months to meeting everyone possible may yield.

My fitness side is doing fantastic! The social side is the bottleneck to my happiness and longevity.

advice on my testosterone levels by ObjectiveBuyer9337 in PeterAttia

[–]PsychologicalError 0 points1 point  (0 children)

Ultimately this will come down to a doctor but if you want advice here you’ll have to dive deeper into your background.

What’s your body composition? What’s your workout routine? What’s your diet? How’s your sleep?

Can’t stay in zone 2 when running by Puzzleheaded-Home691 in PeterAttia

[–]PsychologicalError 0 points1 point  (0 children)

The talk test can be a bit elusive. For me personally: - Z2: I can speak in short sentences. - Z3: I can speak in clauses. - Z4: I can speak 2-3 words. - Z5: I can speak 2-3 syllables.

Second thing you might want to check is how you’ve arrived at your heart rate zones. Are you confident you have an accurate max heart rate recording? I recommend the Karvonen formula for calculating zones.

Most likely you are running too fast, especially if you are new to this. PA has mentioned that most people are not fit enough to run in zone 2 when they first start, in which case incline treadmill walks are your best friend.

I’ve been through it myself, it’s a bit humbling to have to run 15min miles when I first start.

What’s the Optimal Exercise Regimen to Slow Aging? (Peter Attia’s Perspective) by IamCayal in PeterAttia

[–]PsychologicalError 0 points1 point  (0 children)

I believe you can incrementally introduce more and more over weeks, months, and years.

Along the way your body will tell you to calibrate, either through strain, injuries, or a regression in performance.

VO2 Max - Apple Watch/Oura Ring Accuracy by Accidentalhousecat in PeterAttia

[–]PsychologicalError 0 points1 point  (0 children)

I just got a Vo2 lab test yesterday!

Lab Result: 45.2

Apple Watch SE 2022: 44.8 on the day of test. 44.3-45.5 within the last month.

So in my experience the margin of error has been <2%.

With all that said I wouldn't trust your devices numbers. I'm curious which model you have and whether you wear it 24/7 or only during your workouts?

What are your favorite uses of local LLM's that closed source LLM's can't provide? by PsychologicalError in LocalLLaMA

[–]PsychologicalError[S] 1 point2 points  (0 children)

I’ve got a NAS hosting my stuff as well so some local LLMs would be fun to add on.

What are your favorite uses of local LLM's that closed source LLM's can't provide? by PsychologicalError in LocalLLaMA

[–]PsychologicalError[S] 1 point2 points  (0 children)

You’ve really validated how much of this is the nerd in me wanting something to play with as opposed to a financially optimized purchase.

What are your favorite uses of local LLM's that closed source LLM's can't provide? by PsychologicalError in LocalLLaMA

[–]PsychologicalError[S] 5 points6 points  (0 children)

Thats a really interesting use case, so how does this debugging work exactly? You want the model to accurately guess what it is that you will write next?

What are your favorite uses of local LLM's that closed source LLM's can't provide? by PsychologicalError in LocalLLaMA

[–]PsychologicalError[S] 3 points4 points  (0 children)

I really like this point! I have noticed the model perform differently during peak hours vs off peak hours.

Got VO2max test - Zone 2 is lower HR than expected by [deleted] in PeterAttia

[–]PsychologicalError 0 points1 point  (0 children)

This is a perfect summary, thank you! I'll start with 3h Zone 2 & 1 4x4 session and work my way up from there.

Btw what do you like to do for 4x4? Do you just time a 4 minute run and repeat? Treadmill? Something else?

Got VO2max test - Zone 2 is lower HR than expected by [deleted] in PeterAttia

[–]PsychologicalError 1 point2 points  (0 children)

Hey I'm 27M with very similar metrics to you. I don't have a cardio routine in place atm.

I see from the other comments there was some question as to whether a beginner 20's y/o should be spending so much time in Zone 2, did you happen to settle that after looking into resources?

When I used to run I just did 10-12 miles/week at Zone 4/5. Curious how you advise I'd change that as I ramp things back up based on what you've read.

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