Jem Arnold

You should be able to write out "Ctrl+Shift+." elsewhere and right-click paste into the shortcut editor.

I was getting the same annoyance with "Ctrl+Shift+3" appearing as "+#"

Thanks, you just gave me flashbacks of having the same feelings when I played it. Nostalgia with extra -algia 🥲

Very similar feeling to actually scuba diving IMO. The part about gradually getting more confident more than the part about staying on top of survival

Seems to be working. Looks like a better solution, thanks!

Oh great, thanks! Maybe this is the sign to look for a better method to preview final plot sizing than the camcorder hack 😅

Is it just me, or did {ggplot2} 4.0.0 S7 update break {camcorder}? 😢
#rstats #dataviz

Agreed. Metadata compliments data interpretation

(can we call things like effort/intention, environmental context, etc. as 'metadata'?)

Oh they did at least propose updated estimates by performance level in a subsequent paper
dx.doi.org/10.1055/a-20...

At least they used the 5-min clearing effort before the 20-min TT? 😅

Functional Threshold Power as an Alternative to Lactate... : The Journal of Strength & Conditioning Research ified Dmax, fixed blood lactate concentrations of 2 and 4 mmol·L−1, lactate increases of 1 and 2 mmol·L−1 above baseline, and lactate increases of 1.5 mmol·L-1 above the point of minimum ratio between...

Sitko et al, 2022. Functional Threshold Power as an Alternative to Lactate Thresholds in Road Cycling.

A boxplot with individual data for FTP (functional threshold power) and LT1 (power at 2.0 mmol/L) in relative power output (W/kg) from 46 competitive male cyclists. LT1 range equals approximately 61-90% FTP, evaluating by rank order across both measures, since paired individual scores are not known. Data digitised from Sitko et al, 2022. Functional Threshold Power as an Alternative to Lactate Thresholds in Road Cycling. https://doi.org/10.1519/jsc.0000000000004070

Saw a question "what %FTP should my first threshold be at?"

How do we begin to guess? Start with a prediction interval, not a falsely precise point estimate

Data from Sitko et al 2022 helps as a starting estimate (link below 👇)

Any similar datasets? (particularly for female cyclists?)

aaah, so that's why every year I briefly look around at modern mobos but end up sticking with my 10 yr old Asus with onboard optical to drive my 20 yr old Logitech Z-5500s😅

This is really, really good 👀

Really interested in learning about this. Way above my pay grade though 😅

New paper with @drphilipskiba.bsky.social is now out: journals.humankinetics.com/view/journal...

We took a new approach to modeling the power duration curve in cyclists using functional principal component analysis.

Matthews et al, 2023. Identification of Maximal Steady State Metabolic Rate by the Change in Muscle Oxygen Saturation journals.physiology.org/doi/full/10....

Kirby et al 2021. The balance of muscle oxygen supply and demand reveals critical metabolic rate and predicts time to exhaustion journals.physiology.org/doi/full/10....

Faith Kipyegon & Dr. Brett Kirby using MoxyMonitor #muscleoxygenation #NIRS during training for her 4-min mile attempt coming up now!

They have published how they might be using this information (see links below 👇)

From their promotional bit a few minutes ago

I had the opportunity to contribute to Matt de Neef's wonderful article on iliac artery endofibrosis/FLIA in cyclists

Mostly by knowing where to find the great published diagnostic images, and adding some knowledge we've gained from my recent PhD work on screening and conservative management👇

More on conservative management and return to sport guidelines after surgery

I had the opportunity to contribute to Matt de Neef's wonderful article on iliac artery endofibrosis/FLIA in cyclists

Mostly by knowing where to find the great published diagnostic images, and adding some knowledge we've gained from my recent PhD work on screening and conservative management👇

Why are so many pro cyclists getting iliac artery surgery? We're hearing more about external iliac artery endofibrosis than ever before, but is it actually on the rise? Plus: what even is it? And how is it treated?

As many as 1 in 5 pro cyclists will experience a pelvic artery issue during their career. Learn all about iliac artery endofibrosis in our deep-dive feature. escapecollective.com/why-are-so-m...

This is a really elegant design/result.

Thoughts about running? Will propulsion phase be above the critical occlusion tension in locomotor muscles? During sprints? Middle-distance? Marathon??

I'd expect it probably is in gastroc at least, based on how mNIRS deoxygenates during incremental running in many athletes 🤔

Figure 3D shows total work kJ is basically constant across loads under cuff occlusion, supporting W'bal model

Apart from 80%1RM, in which reps were low enough that a missing fractional last rep would meaningfully reduce total work

@matthewfliss.bsky.social any more thoughts on this?

Oh good thoughts, thanks Cap. Something like that seems likely given motor unit recruitment with fatigue. Would larger MUs recruited at lower forces lower effective COT during a prolonged task?

Is COT prior work dependent, W’bal dependent etc ? It can be manipulated by BFR, so I would think W’bal sensitive

A Critical Occluding Tension Phase Transition Occurs Between 30% and 40% 1RM in Dynamic Knee Extension Exercise Oxygen delivery and utilization to working muscle(s) are essential for sustained exercise performance. Higher contractile loads can occlude intramuscular blood vessels, limiting oxygen perfusion, whi...

A Critical Occluding Tension Phase Transition Occurs Between 30-40% 1RM in Dynamic Knee Extension Exercise

From @matthewfliss.bsky.social @hplburr.bsky.social @martinmacinnis.bsky.social et al 11/11🧵
onlinelibrary.wiley.com/doi/10.1111/...
#NIRS #ExercisePhysiology #SportScience

For his PhD, @matthewfliss.bsky.social will be trying to determine whether COT represents an absolute or a relative load, with high frequency mNIRS and intramuscular pressure recording during knee extension bouts

Watch his work! Fascinating stuff 10/
bsky.app/profile/jema...

Image from a slide showing total work (kilojoules) performed during knee extension bouts from 15 to 80% one rep maximum (1RM), under free flow and occluded conditions. Suggesting that below 25% 1RM is closer to “endurance” exercise, while resistance exercise is above 40% 1RM, and in between is a hybrid or transition between the two.

Lead author Matt Fliss presented this work from his PhD at the recent 2025 Moxy Summit, which is available free to watch 9/
moxy-academy.teachable.com/courses/moxy...

Figure showing femoral blood flow velocity during knee extension at a tension of 10% maximal voluntary contraction (MVC). Blood flow reduces close to zero during contraction phases, and increases during relaxation phases. https://physoc.onlinelibrary.wiley.com/doi/10.1113/jphysiol.1988.sp017332

Even in “pure” endurance sport like cycling, there are momentary intramuscular occlusions during every pedal stroke above a certain power

Pushing on the pedals squeezes blood out of muscle like a sponge. Relaxing the muscle allows blood to flow back in 8/