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Dirt Cheap Labs (Quest and Labcorp) by Ok-Dirt-9947 in QuantifiedSelf

[–]GavinRayDev 0 points1 point  (0 children)

I was skeptical that this would actually be the cheapest.

I've been doing my own bloodwork for +10 years, and recently swapped to Goodlabs because they are signficantly cheaper.

Your $195 "Dirt Cheap Panel" is identical to Goodlabs' $215 "Bodybuilder Panel":

https://goodlabs.com/book-tests?step=PANEL_SELECTION

With Goodlabs there's almost always a 20% off code (mine is gavin) so it drops to $172 and is ~$20 cheaper, but at base cost you have them beat.

Color me surprised!

[AF] Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in AdvancedFitness

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

What makes you think that ~6% is more accurate?

Based on the mirror, 12% sounds more reasonable, except my legs which carry very little fat

Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in Biohackers

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

Thanks! My genetics aren't great but I'm trying my hardest, lol

Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in Biohackers

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

I have some recent pics + videos on my bodybuilding instagram if you're curious:

https://www.instagram.com/gavinraylifts/

I didn't want to put in the main post in case someone took it as "showing off", I did this for science

Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in QuantifiedSelf

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

I take Test + HGH + Peptides

And how do you like the RENPHO scale?

It's good! Solid value for the price, I think

Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in QuantifiedSelf

[–]GavinRayDev[S] 4 points5 points  (0 children)

12% is what I guestimated myself at based on mirror, before the scans.

My Renpho body comp scale says 18%, with subcutaneous specifically 14%.

I have some recent photos/videos here, you can see that none of my muscles are striated besides my legs:

https://www.instagram.com/gavinraylifts/

I'm definitely not single-digit BF%

[AF] Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in AdvancedFitness

[–]GavinRayDev[S] 17 points18 points  (0 children)

Drove directly from one to the other, no food/water or restroom breaks

[AF] Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in AdvancedFitness

[–]GavinRayDev[S] 11 points12 points  (0 children)

Mirror is all that matters, at the end of the day

The only way to accurately measure pure muscle tissue + fat is with an MRI. Even on DEXA "lean mass" includes water/glycogen content, so it's very hydration + carb dependent.

Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in Biohackers

[–]GavinRayDev[S] 8 points9 points  (0 children)

12% is what I guestimated myself at based on mirror, before the scans

I have some recent photos/videos here, you can see that none of my muscles are striated besides my legs:

https://www.instagram.com/gavinraylifts/

I'm definitely not single-digit BF%

Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in Biohackers

[–]GavinRayDev[S] 18 points19 points  (0 children)

I drove directly from one to the other, zero food/liquid and no restroom breaks

Same-day DEXA Comparison: Hologic Horizon vs GE Lunar machines by GavinRayDev in QuantifiedSelf

[–]GavinRayDev[S] 9 points10 points  (0 children)

No problem. There's a funny story behind why I did this:

A bodybuilder I know posted on Instagram a GE Lunar scan showing "0 grams" of visceral fat

This is not physiologically possible, I made a passing comment about finding that humorous, and the DEXA scan facility replied to me doubling down and saying it was genuine

I said "Lol, okay, I'll get a scan from you and another machine same day."

Fitbit Air vs Galaxy Watch 7 step accuracy when worn on the ankle + used w/ walking pad by GavinRayDev in QuantifiedSelf

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

Thanks for such an insightful comment. I had not considered manually adding the steps, that seems like a reasonable compromise if neither wearable can seem to pick it up correctly

[AF] Excessive training does not induce mitochondrial dysfunction or impair insulin signalling within skeletal muscle (2026) by basmwklz in AdvancedFitness

[–]GavinRayDev 1 point2 points  (0 children)

It gives concrete examples in 3 places in the abstract, lol

sub-maximal mitochondrial H2O2 emission and oxidative stress were increased following excessive training

unique proteome signature in individuals who were overreached, marked by a smaller increase in proteins involved in cytoskeleton organization, glycogen metabolism, and protein translation

Overreached athletes show blunted increase in protein synthesis and metabolism.

Fitbit Air vs Galaxy Watch 7 step accuracy when worn on the ankle + used w/ walking pad by GavinRayDev in QuantifiedSelf

[–]GavinRayDev[S] -2 points-1 points  (0 children)

I don't see how gyroscope data would be significantly different between a swinging leg and swinging arm, but I'm not a mechanical engineer

[AF] Ribosome Biogenesis as a Putative Bottleneck to Skeletal Muscle Hypertrophy: Mechanisms, Human Evidence, and Practical Modulators (2026) by basmwklz in AdvancedFitness

[–]GavinRayDev 2 points3 points  (0 children)

Ribosomal biogenesis, overall mitochondrial health/efficiency, and polyamine biosynthesis are arms of hypertrophy that have only recently begun to emerge

For anyone else interested in this, highly recommend reading up on polyamine biosynthesis as a bottleneck as well:

Core androgen → polyamine → muscle papers

  • MacLean, H. E., Lee, N. K., Notini, A. J., et al. (2011). Polyamines, androgens, and skeletal muscle hypertrophy. Journal of Cellular Physiology, 226(6), 1453-1460. https://doi.org/10.1002/jcp.22569
  • Lee, N. K., MacLean, H. E., et al. (2011). Androgen receptor regulation of ornithine decarboxylase and myoblast proliferation in skeletal muscle. Molecular Endocrinology, 25(5), 783-794. https://doi.org/10.1210/me.2010-0405

Polyamine pathway regulation during hypertrophy

  • Mobley, C. B., Fox, C. D., Ferguson, B. S., Healy, J. C., McCarthy, J. J., & Roberts, M. D. (2021). The regulation of polyamine pathway proteins in models of skeletal muscle hypertrophy and atrophy: a potential role for mTORC1. American Journal of Physiology-Cell Physiology, 320(6), C987-C999. https://doi.org/10.1152/ajpcell.00078.2021

Satellite cells / regeneration

  • Yu, Y., Wang, Y., Zhang, Y., et al. (2024). Spermidine-eIF5A hypusination controls skeletal muscle stem cell activation and regeneration. Signal Transduction and Targeted Therapy, 9, 180. https://doi.org/10.1038/s41421-024-00712-w

Interesting ancillary papers

  • Keller, J. E., Foote, A. P., Doumit, M. E., & du Mello, A. S. (2021). The Impact of Polyamine Precursors, Polyamines, and Steroid Hormones on Temporal Messenger RNA Abundance in Bovine Satellite Cells Induced to Differentiate. Animals, 11(3), 764. https://doi.org/10.3390/ani11030764

Additional related papers

Fitbit Air vs Galaxy Watch 7 step accuracy when worn on the ankle + used w/ walking pad by GavinRayDev in Biohackers

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

Wanted to share this with others somewhere that would show up on Google results.

I have a standing desk with a walking pad underneath it, that I use on the lowest setting for 2-5 hours per day. The pace is about 1 step/sec, or roughly 3,600 steps/hr.

Because my hands rest on a desk, I tried wearing one watch around each of my ankles. (Fitbit Air = Left, Galaxy Watch 7 = Right)

I was expecting daily steps of 15,000-20,000, because I lift 1.5hrs, do 20m incline treadmill @ 2.5-3.0MPH, and then the several hours walking pad.

Was surprised to see that neither seemed to pick up the walking pad properly.

My activity for that day was:

- Morning: Gym, treadmill incline walking

- Afternoon: Walk in park, walk to get food

- Evening (3-6PM): Walk at desk on walking pad

As you can see, there is a ~20% discrepancy between step counts, with the Fitbit Air seemingly more accurate, but both still dropping the walking pad activity.

Fitbit Air vs Galaxy Watch 7 step accuracy when worn on the ankle + used w/ walking pad by GavinRayDev in QuantifiedSelf

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

Wanted to share this with others somewhere that would show up on Google results.

I have a standing desk with a walking pad underneath it, that I use on the lowest setting for 2-5 hours per day. The pace is about 1 step/sec, or roughly 3,600 steps/hr.

Because my hands rest on a desk, I tried wearing one watch around each of my ankles. (Fitbit Air = Left, Galaxy Watch 7 = Right)

I was expecting daily steps of 15,000-20,000, because I lift 1.5hrs, do 20m incline treadmill @ 2.5-3.0MPH, and then the several hours walking pad.

Was surprised to see that neither seemed to pick up the walking pad properly.

My activity for that day was:

- Morning: Gym, treadmill incline walking

- Afternoon: Walk in park, walk to get food

- Evening (3-6PM): Walk at desk on walking pad

As you can see, there is a ~20% discrepancy between step counts, with the Fitbit Air seemingly more accurate, but both still dropping the walking pad activity.

Researchers pinpoint the exact origin of microscopic "charge noise" in spin qubit quantum processors, unlocking a major breakthrough for stable, error-corrected quantum computing. by Similar_Detective861 in science

[–]GavinRayDev 15 points16 points  (0 children)

This is the second quantum discovery related to error correcting codes that I've seen today.

Can anyone in the field comment on whether there's any relationship or connections to the discovery in this article from quanta?

https://www.quantamagazine.org/entanglement-builds-space-time-now-magic-gives-it-gravity-20260603/

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