Glyn Griffiths

Veteran National Hill Climb Champ 2018&20 • @WTTA_HC_SERIES Organiser • Cycling Coach @WestSideCoachin • 🏴󠁧󠁢󠁷󠁬󠁳󠁿Cymro,Cymraeg 🇪🇺🇺🇳 • Joseph's Dad •

[kilian jornet @kilianj]

In the past years I’ve been doing some DLW testing for energy expenditure at different moments. During training weeks, at a long project and during a long race. How much energy do we spend is important to comprehend to ensure staying healthy and to perform. (1/3)

[Glyn Griffiths @Di_Bach]

This 👇, so much great information in 1 tweet.
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Biggest gains I and my athletes have seen is when we layer training zones together at the right volume and timing to allow adaption. Not just ride polarized or pyramidal, you're missing out if just sticking to 1 principle.

[Steve Magness @stevemagness]

So genuine question, how come you don't train to reflect this in your own running?

Why aren't you pulling an Emil Zatopek and doing 400s every day? Why do you train using a traditional distance running philosophy and periodization if the mitochondria adaptations, which are one of the main drivers of aerobic performance, are HIIT driven/superior?

I think what's often lost in these studies is:
-Short term vs. long term
-Isolated studies that don't reflect the real world.

No one worth any of their salt recommends only HIIT or only moderate training. The genius breakthrough of Lydiard wasn't to ONLY run a ton of easy/steady miles...it was that sequencing mattered, and that a whole lot of easy set you up for better results once you sharpened up. He realized that sharpening plateaued on its own, and was better when preceded by lots of aerobic work.

And that was the big innovation that drove distance performance, and we've been iterating off it for decades.

So when I see people argue HIIT vs. Moderate,
I really do mean that we're stuck having the arguments of the 1950s. You can go read these arguments in Fred WIlt's wonderful books. They are right there.

Why are we acting like its the 1950s?

Why not move to the modern era, where we say: we need everything, and it's not either/or, it's timing and sequencing.

Now, for the novice, will it matter much in the short term? Maybe not, they will respond to anything initially and get better.

But...where I think it does people a disservice is you have amateurs listen to folks who say "go run HIIT 5 days a week!" or "never go above zone 2..." And both do people a disservice.

Can people survive off either? Sure. And still get better. Go look at Jim Ryuns training... but we know so much more than the 1950s now.

Why not treat folks like adults and give them the truth and nuance?

The way I think about it is: If I saw a high school coach taking in novice kids who had never run cross-country before and said, "Great, 5 days a week of HIIT. Get those mitochondria up!"... we all knew those coaches growing up and the end result...

We called them old school for a reason... Let's not make the mistakes of ignoring history because it's really hard to do good science that translates to practice in training studies.

[Sharon Graham @UniteSharon]

This year, Unite's energy report with some stark findings: Energy companies made £30 billion profit in 2024. £500 of the average household energy bill goes on pure profit, roughly a third. Bring energy back into #PublicOwnership.

[Glyn Griffiths @Di_Bach]

Only 6 months to go and the days will shorten again 😃

[Stonehenge U.K @ST0NEHENGE]

The Winter Solstice alignment at Stonehenge today☀️ Photo credit Nick Bull 🙏
#winter #wintersolstice #Solstice #december #sunset #landscape

[Jeremy Frisch @JeremyFrisch]

I’ll try to make this as crystal clear as possible, because much of the strength and conditioning field still views resistance training through a very narrow lens—a weight room filled with barbells and dumbbells.

I’ve read the research. I’ve seen the papers. Resistance training for pre-adolescent children consistently shows positive outcomes across the board. That part isn’t controversial anymore.

Where the confusion lies is what actually counts as resistance training for kids.

In our industry, “resistance training” has become almost synonymous with external load. And to be clear—external loading through dumbbells, barbells, kettlebells, bands, and medicine balls is absolutely safe and beneficial when properly coached.

But resistance training does not begin and end there.

Sprinting, jumping, grappling, tackling and blocking, climbing, crawling, carrying, throwing, parkour, gymnastics, and Ninja-style activities are all legitimate, highly effective forms of resistance training. These activities challenge force production, absorption, coordination, and control—often at levels far more complex than a single-plane lift.

More importantly, they’re fun, engaging, and developmentally appropriate. They expose kids to resistance through their own body weight, gravity, momentum, and interaction with the environment—across multiple planes of motion and constantly changing contexts.

If the goal is to build strong, resilient, adaptable athletes, then resistance training for children must be viewed as a movement experience, not just a loading strategy.

[Glyn Griffiths @Di_Bach]

@Captain7bag I do like to see how people pace a Hill Climb,some go out hard and then slowly the pace gets to them and speed lowers. Sometimes to a dramatic effect.
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From an n=1, I preferred to hold back 5-10% and then start emptying the tank about 2/3 into the duration of the effort.

[Glyn Griffiths @Di_Bach]

@RichieGoulding1 @hahaboy43 Hi Richie, the TTE for 50%ΔGET-CP is (2606 ± 732 s). How many hrs a week and yrs training had the participants typically train for?
Reason I ask is I would expect this duration to be longer?

[Glyn Griffiths @Di_Bach]

“The sight of unelected hereditary peers blocking stronger rights for millions belongs in another century – not modern Britain.”
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‘Out of touch’ hereditary peers criticised for voting against workers’ rights | House of Lords | The Guardian https://t.co/CVo7tM01ry

[Glyn Griffiths @Di_Bach]

@Captain7bag What examples would you say we're useful and what examples would be harmful?

[Glyn Griffiths @Di_Bach]

Great turnout and result for the @WestSideCoachin @73DegreesBikes race team yesterday. 5 riders from the team managed to finish in the top 5 places across various categories.

[British Cycle Sport @VeloUK]

More pictures of the Western CX League from Pete Edmondson are here https://t.co/s2CFX49xyZ

[Make Votes Matter @MakeVotesMatter]

Proportional Representation is an idea whose time has come.

60% of the public agrees.
More MPs than ever agree.
Supporters of all parties agree.

Now let's make the government listen. Join us today: https://t.co/ycPsqfrjYM

[Ana Ribeiro 💙 @anabl18]

@Bez78829056 @SandraDunn1955 @RichardBurgon The European Convention of Human Rights (ECHR) was created on the aftermath of WWII due to atrocities committed by Nazism and fascism. It protects citizens from their *own* governments, in case they go rogue, abuse power etc. Churchill was instrumental in its creation.

[Glyn Griffiths @Di_Bach]

@mwt2008 @jizz_turkey What size battery do you have to charge during off peak? What size house and solar system do you have?

[Glyn Griffiths @Di_Bach]

Brilliant result for Charlie, top 10 at the Nationals @WestSideCoachin @73DegreesBikes

[British Cycle Sport @VeloUK]

HC Result: Rachel Galler, Harry MacFarlane, Ruby Isaac and Harry Hudson four of the winners at the RTTC National Hill Climb Championship in Matlock
https://t.co/ryvTnGG5Lt

#Brother4Results | Presented by @TrainSharpJon https://t.co/R5s7ULrkge #coachingworks

📸 Anthony Wood

[ammattipyöräily @ammattipyoraily]

🇫🇷 2026 TOUR DE FRANCE (4/7-26/7) | #TDF2026

🖼️ All stage profiles that are available (Stage 2 added)

[Steve Martin @UnrealBluegrass]

We aren't learning.

[Glyn Griffiths @Di_Bach]

@Nyborger_Nybo @UCI_cycling I havent see this years road event mixed TTT but I've watched editions of the cyclocross Worlds event of a similar but different nature where they had a mixed relay and it was a very exciting race.

[Dr Rachel Clarke @doctor_oxford]

Here I am in 2020 in the flimsiest, most pitful PPE - like so many other NHS staff, some of whom died from the Covid they caught in their hospitals.

Tory peer @MichelleMone - who today rightly (& wonderfully) lost her legal case - dares to claim she’s been ‘scapegoated’.

What, Michelle?

For the £122 million you pocketed from taxpayers for delivering unusable PPE – at least £65 million of which went straight into your venal husband’s offshore accounts in the Isle of Man?

For being one of a small minority of corrupt grifters who saw a global pandemic as nothing more than a chance to get rich quick?

For caring more about lining your own pockets than the deaths of NHS staff & patients?

For being disgustingly cynical & avaracious - unlike all those millions of ordinary, decent Britons across the country who stepped up with such courage & decency?

I was given masks whose ear loops fell off & aprons so flimsy they ripped apart when you tried to put them on, Michelle.

Nurses and porters in our hospital died from the Covid they caught there, Michelle.

How dare you try to bleat victimisation now, Michelle?

You are the polar opposite of the values that should govern public life.

Repay what you owe & get your dishonourable form as far away from the House of Lords as possible.

[Glyn Griffiths @Di_Bach]

#CofiwchDryWeryn
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Tryweryn: How Capel Celyn was flooded to make water for Liverpool - BBC News https://t.co/PaLLavKxrI