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Karl Zelik Profile picture
@KarlZelik
Aug 17, 2020 • 3 tweets • 2 min read • Read on X
New 800+ runner study:
"the beneficial effect of greater shoe cushioning on injury risk in the present cohort is not associated with attenuated VIPF & VILR. These GRF metrics may be inappropriate markers of the shoe cushioning-injury risk relationship"

tandfonline.com/doi/full/10.10…
1/
If a part INSIDE our car engine kept wearing out, we wouldn't measure pressure UNDER the tires to troubleshoot.

If muscles/bones/tendons INSIDE our body get injured due to overuse, then we shouldn't expect force UNDER our feet to be the key to understanding/resolving either.

2/ Image
In college I was a triple jumper & bruised my heel (fat pad). GRF (the force under my heel) would have made sense to monitor, & blame. I'm all for GRF when it's justified. IMO it often doesn't seem to be.

As #biomechanics field we must go deeper.

journals.plos.org/plosone/articl…

3/3

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More from @KarlZelik

Karl Zelik Profile picture
Jun 3, 2023
Exoskeletons in construction:

Nice article posted to the Associated Builders & Contractors of Wisconsin website & co-written by Prof. Zhenhua Zhu from UW-Madison & Mariya Sorenson, a construction manager with M.A. Mortenson.

They highlight 3 potential broad impacts of exos: Image
1. Improving worker safety & fostering a better safety culture in the construction industry.

Exoskeletons can reduce fatigue, muscle strain & wear-and-tear injuries, which could lead to substantial cost savings.
2. Alleviating the shortage of skilled construction workers.

Exoskeletons could help extend careers & attract candidates who might otherwise be deterred by physically demanding jobs.
Read 7 tweets
Karl Zelik Profile picture
May 31, 2023
🚀 5 years ago, I stumbled—somewhat unexpectedly—into the world of tech translation, commercialization & startups. It's been a wild & enriching adventure!

👨🏾‍🔬 As a scientist-turned-entrepreneur, this journey opened my eyes to the business world.

But...
😡 Amidst all the positive learning & growth, there's one thing that truly gets under my skin: misleading marketing & unsubstantiated claims.
😬 Brace yourself: The wearable & assistive tech industry (think #exoskeletons, #prosthetics, sensors) is still plagued by this problem! Whether it's in clinical, occupational, sport, or recreational applications, we need to address it head-on.

Now...
Read 11 tweets
Karl Zelik Profile picture
Nov 16, 2022
I spend a lot of time thinking about & discussing the science of #exoskeletons.

3 years ago, the single most common question I heard was:

❓Do exoskeletons cause muscle atrophy?

Short answer: No.

But I don't hear this as often anymore.

I believe there are 2 reasons why👇🏽
1️⃣ Science Communication

• For a long time, exo engineers/scientists mostly spoke to each other

• But now a broader audience is interested in exo tech

• And more researchers/developers are engaging in public discourse

This is helping reduce exo myths & misconceptions 👏🏽 🎉
If you want a quick rundown on:

• what causes atrophy (muscle weakening/wasting)

• why exos are more likely to prevent atrophy than to induce it

Then check out this thread:
Read 7 tweets
Karl Zelik Profile picture
Nov 15, 2022
Where do your research ideas originate from?

I used to source all of mine from academic literature & conferences, or from my own research.

But these can become echo chambers that limit thinking & creativity.

🔥 Here are 4 overlooked places to find impactful research problems:
1️⃣ Your own life

• This is why I started studying low back #biomechanics
• I was a parent to young kids & experiencing back pain
• I was curious if we could create more practical exoskeletons that'd fit into my own life

It started as an undergrad project then grew into more:
2️⃣ Spending time w/ users

• In academia we often talk about this
• But we tend to involve users too late in R&D
• And I'm not convinced we spend enough time doing it

Hearing pain points directly from #prosthetics users is what prompted the daily activities we now study:
Read 6 tweets
Karl Zelik Profile picture
Oct 15, 2022
Science is the foundation, but user feedback is the north star:

• to know what to prioritize
• to learn where to improve
• to remember why you sweat all the science details

This is a vital lesson for those doing applied research whose feedback is mostly from other scientists
The combination of #biomechanics science and user-centric design is beginning to have the real-world impact the occupational #exoskeleton field long hypothesized it would.

End-users explain this best:
“When you show you care about people, that retains people,” one warehouse worker who piloted a back exosuit said. “Everybody in here, we’re all sore. We’re all hurting. But for the first time in a long time I won’t be hurting walking out of this building [because of the exosuit]”
Read 4 tweets
Karl Zelik Profile picture
Oct 14, 2022
Early career researchers often stress out when they talk to more senior faculty about how many grant proposals they submit.
 
Don't compare. Focus on your writing process. Outcomes will follow.
 
Here are 5 proven tricks senior faculty use to submit more high-quality proposals:🧵
1. Resubmitting

• Revise/resubmit an unfunded proposal
• This takes much less time than writing a new application

This is easier to do (and comes naturally) as you get further into your career.
2. Repurposing

• Take a similar core idea and apply it to a new population or context
• Or you can sometimes submit the same proposal to multiple agencies (check w/ program officers first; you just can't accept two grants for the same work)

This helps get more shots on goal.
Read 7 tweets

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