Jem Arnold
@jem_arnold
Followers
3K
Following
15K
Media
829
Statuses
5K
PhD candidate 🇨🇦 physiotherapist. Sport vascular conditions, performance testing, mNIRS. Treat declarative statements as questions?
Vancouver, Canada
Joined January 2016
Just published from my (eventual) PhD thesis 🔖. Review of conservative treatment (CTx) for Flow Limitations in the Iliac Arteries (FLIA, endofibrosis) and proposal of Return to Sport (RTS) guidelines after surgery. Here is what we learned🧵/14
6
20
116
RT @Scienceofsport: Remarkable insight from Michael Woods on safety in cycling. I often criticize the lack of good, transparent epidemiolog….
0
7
0
RT @CSchytz: News from our lab: 4 weeks of high altitude decreases human skeletal muscle mitochondrial cristae density, while mitochondrial….
0
7
0
RT @Captain7bag: @jem_arnold Probably bring in a sociologist (is that the right discipline?) to compare to others exercise trends. For exam….
0
1
0
RT @jem_arnold: 🩸Blood lactate [BLa] does NOT increase exponentially during high intensity exercise 🧑‍🔬. Why do we make this common mistake….
0
89
0
If we're having a conversation and I misunderstand you, it's my responsibility to try to understand better. If you misunderstand me, it's my responsibility to try to make myself better understood. Say it with me: "It's always my responsibility to communicate better".
1
0
25
Good conversation. Not incompatible, just different perspectives on the same questions. Population health policy/promotion 🤷‍♂️ Elite performance optimisation.Mechanistic Ex Phys 🤷‍♂️ Applied sport sci.Controlled causal inference 🤷‍♂️ Real-world ecological validity.
Hey Steve!! I’m really not here to argue, but I do want to (respectfully!) clarify a few things about our paper so it’s not misrepresented. Appreciate the chance to add a bit of nuance to the discussion!.
2
0
16
🧵👇.🔗👇.
Does training above max metabolic steady state MMSS (CP, FTP, MLSS, LT2) improve V̇O₂peak & time-trial in endurance-trained athletes MORE than training only below MMSS?. Think the answer is obvious? We kinda did too. So we did a meta-analysis! 📚🔖.🧵/13.
0
0
7
Exactly the same for our meta comparing training exclusively below maximum metabolic steady state (MMSS) in MOD & HVY, to training which included HIIT above MMSS in SVR. Greater improved VO2max, but no difference in endurance performance (🧵🔗👇).
Re: the Molmen paper - their “Endurance Training” group includes anything below LT2. But very few studies actually prescribe training below LT1. So that paper doesn’t provide support for Zone 2 specifically. Just steady state exercise, most likely above Zone 2. So, it’s more like.
1
1
20
RT @k_storoschuk: Hey Steve!! I’m really not here to argue, but I do want to (respectfully!) clarify a few things about our paper so it’s n….
0
52
0
RT @EscapeCycling: The UCI wants to limit gear ratios to make racing safer. So we need to:.– Assume unrealistic limits on cadence.– Affect….
0
1
0
RT @SamueleMarcora: @stevemagness The science isn't flawed. It's the over interpretation of the science that is flawed. P.S. A better descr….
0
1
0
Similar to other 'invisible injuries' such as repeated concussion or heart issues,. It's a difficult decision, but at some point the health of the rider must take priority over professional sport. We are working to improve detection & management options. (thanks @DJ_Lipman).
0
0
3
"[Eddy Finé] is struggling with an abnormality in the iliac artery, a problem that is incompatible with top-level sport". Ah really sorry to hear this. I hope earlier detection and better management options can improve prognosis for riders with this injury.
1
0
5
Nice review of data > vibes!.My initial thoughts: "zone 2" is not magic. Z2 is better when we can do more volumes of it.If we are time/volume-limited, Z2 becomes proportionally less important.If we are stress-limited (training or non), Z2 becomes proportionally more important.IMO
It's out!! I am so excited to share this review addressing popular beliefs and claims within popular media around Zone 2 training. I feel very privileged to have worked on this with my amazing co-authors, Dr. Brendon Gurd, Andres Moran-MacDonald, and @gibalam. Social media has
3
6
61
They intentionally weren't playing by the rules, hence it did not qualify as an official WR. Seems fine to me? That wasn't their intent 🤷‍♂️. Although I can see how the marketing has obscured this.
1
0
3
Is this "cheating" but everything else they were doing in this non-official "demonstration" wasn't? Is there a line they crossed?. The rules of sport are arbitrary, but sport is defined by those rules. If we're playing outside the rules, we're just not playing the same sport.
New Update to my women's sub 4 mile attempt article. Nike cheated. They apparently used "moving" time instead of the actual gun time. All to shave half a second off her time. It's shameful behavior. I break it all down:
1
0
10
RT @Jamie_langley1: If you missed the online vLamax conference, all of the presentations have now been uploaded to YouTube by Dr. Michael P….
0
10
0
RT @k_storoschuk: It's out!! I am so excited to share this review addressing popular beliefs and claims within popular media around Zone 2….
0
54
0
RT @MatthewBJane: @lu_sichu @tracewoodgrains Mixed feelings. In practice he is right. The big problems are as follows: . - people who condu….
0
9
0