Greg Lehman

Physiotherapist, Clinical Educator & Strength &Conditioning Specialist. Movement Optimist and Old Man Tumbler

[Greg Lehman @GregLehman]

@mackinprof @grok Pedant here but Mexico might be their largest trading partner. I think we are second. Still an unhelpful situation

[Greg Lehman @GregLehman]

@hcastleee Works for me

[Greg Lehman @GregLehman]

A good example of a valid recommendation (which has been done forever) but dressed up in false precision. Run lots, mostly slow, sometimes hard.

[Steven Quartz PhD @StevenQuartz]

Alan Couzens engages a lot in scientific-looking BS that's marketing dressed up as rigor. His chart below is a prime example: arbitrary quantities given decimals and units to produce a recommendation that's not even the consequence of the 'model.' And what's left is just the standard recommendation about training intensity distribution. Let's unpack this:
The benefit:cost column is just fitness benefit divided by recovery cost. The mechanical risk/injury column doesn't even figure in the calculation despite the headline about risk.
But what happens when you divide a per-minute variable by another per-minute variable? You cancel out duration! That's a fatal move for any training allocation model.
And where do the per-minute benefits and costs come from? Hint: change the Z2 benefit from 5 to 6 and you get a tie between Z1 and 2. So the outcome depends entirely on carefully hand-choses values.
Here's the kicker: his 'use higher zones sparingly' doesn't even follow from the math. Adding any Z2–Z5 only makes the model’s objective worse. In other words, the model provides no internal rationale for higher-intensity training at all!
So, strip away all the pseudo-quantification and you're left with the standard recommendation of mostly easy with some hard sprinkled in. The science-looking arithmetic doesn't establish that recommendation, and it can't even reproduce it.
P.S. I would have tagged Couzens but he blocked me long ago when I suggested his zone 1 looks alot like what most other schemes call zone 2 (it is). He blocks everyone who raises even the faintest scrutiny about his approach, which seems to me hardly the temperament of a 'mad scientist.'

[Greg Lehman @GregLehman]

@Matthew_Rupiper But the the take away is old. This guy adds nothing new

[Greg Lehman @GregLehman]

@function2fitnes How do you know that's the precise biomechanical driver? That has never been validated. Nor has the intervention to avoid compression been validated. You might be right but we need to hold back on this certainty

[Greg Lehman @GregLehman]

@physiojack @BillingMartin For sure, but these are all things that could be other diagnoses. So, that implies we would need other criteria to diagnose knee OA an exclude something else (e.g knee cap pain)

[Greg Lehman @GregLehman]

@BenMulroneyShow @BenMulroney @fordnation Victory is such a weird way to put this. I don't understand how bike lanes are politicized. Why would you not want alternate forms of commuting that make driving better?

[Greg Lehman @GregLehman]

@BillingMartin @MensahPT Can you expand on this? Are you explaining the idea that OA is a local manifestation of a systemic issue (metabolic disorder etc) and these variables "sensitize" the normal joint changes that occur with age?

[Greg Lehman @GregLehman]

@physiojack @BillingMartin Also the criteria for most knee pain in those over 45.

[Zach Bitter @zbitter]

"but zone 2 work can improve v02max!"

This is true, but incomplete. You can do all the zone 2 work in the world, but if it comes at the expense of including strides, sprints, short intervals further up the aerobic intensity spectrum you will walk outside one day and realize your 5km PR pace feels like an all out sprint.

[Greg Lehman @GregLehman]

@BradMBradford Is this based on data? What else are we doing to address everything that leads to these problems? https://t.co/NHUs7hrjyU

[Greg Lehman @GregLehman]

Horrible people

[The Sp⚽️rts Physio @AdamMeakins]

So its actually been 7 years, 6 months, 5 days…

Or 391 weeks and 6 days…

Or 2,743 days…

And still the HCPC hasn’t decided if I am fit to practice as a physio due to some petty, malicious, vindictive people making either false or ridiculous complaints about my so called unprofessionalism!

Full list of allegations here if anyones interested! https://t.co/rbKi5u7V5c

[Greg Lehman @GregLehman]

@BradMBradford This sounds great but it should be this in addition to the most direct route as well

[Greg Lehman @GregLehman]

@BradMBradford Data please

[Greg Lehman @GregLehman]

@BradMBradford Where is your data that these bike lanes negatively impacted businesses and substantially changed ALL commuting times.

[Greg Lehman @GregLehman]

@WildcatsSAQ @DaltronPrime Ha

[Greg Lehman @GregLehman]

@TrailsAndAlesUK @JasonFitz1 Ha! No way. Killed my Yassos and the marathon killed me

[Greg Lehman @GregLehman]

@TrailsAndAlesUK @JasonFitz1 My Yasso prediction was off by 25 minutes in the wrong direction :)

[Greg Lehman @GregLehman]

@JasonFitz1 I know. I was kidding. I don't think its predictive at all. It's just a moderately neat coincidence