Ken Clark, PhD

PhD in Biomechanics, Researcher in Human Performance, Strength & Conditioning Coach (CSCS, USA-W), interested in all things SPEED

[JB Morin @jb_morin]

🚨NEW STUDY - Pre-PRINT🚨
Sprint running (max and submax speed) is a great plyometric stimulus🏃🏻🦵: direct comparison of ground reaction force-time w/ classical plyometric tasks.
Read our new study (Pre-print) by @CriFubiani et al. here & send feedback🙏:
https://t.co/twxq7wynXT

[Garnet Valley Football @GarnetValleyFB]

Training the Browns in the Spring and the Jags in the summer.
Coach Clark is the best in the business and we are so lucky to have him part of our program!!
@KenClarkSpeed

[Universal Speed Rating @universal_speed]

Why did we create the Speed Science Institute?

Listen to our Co-founder @les7spellman explain what the Speed Science Institute will accomplish, under the leadership of @KenClarkSpeed and Peter Ruppe and how it will impact coaches and athletes.

Learn more⬇️

[Universal Speed Rating @universal_speed]

It’s here.

Introducing the Speed Science Institute, our governing body for how we develop, interpret, and teach coaches to use performance data.

Founding members:

@KenClarkSpeed, Executive Speed Scientist
Peter Ruppe, Executive Director

Learn more⬇️

[Penn State Track & Field/Cross Country @PennStateTFXC]

Was an amazing experience having @KenClarkSpeed from @usatf on campus! 🏃

#WeAre | #PSUTF

[Fred Duncan @Fred__Duncan]

language around this comes from the work of researchers like Weyand & Clark, who have done a lot to explore both the drivers of speed and the mechanisms that help explain them.

And like all science, this is an ongoing process. We refine the model, keep learning, and keep

[Fred Duncan @Fred__Duncan]

organize the skill at high speed.

Force matters a lot, but it doesn’t exist in isolation.

Limb repositioning speed matters because it sets up the strike. Read @kenclarkspeed work on “whip from the hip.”

What happens during the collision is essential as well…

A lot of the

[Fred Duncan @Fred__Duncan]

A follow up to the previous video…

While force is STILL king…it’s a simplification, and I wanted to add some nuance.

Speed isn’t one variable. It reflects force output, limb mechanics, posture, timing, coordination, tissue qualities, and the nervous system’s ability to

[SimpliFaster @SimpliFaster]

A can't-miss episode!
"Unlocking Sprint Speed with Dr. Ken Clark"

@korfist + @KenClarkSpeed

Streaming everywhere!
https://t.co/4Gt8w7kjXY

[SimpliFaster @SimpliFaster]

Another great topic with @KenClarkSpeed & @korfist — Contact Length (or contact distance)

A simple ratio metric to help you better understand how an athlete is contacting the ground and the efficiency of their stride mechanics 🔥

[Ken Clark, PhD @KenClarkSpeed]

Appreciate it @sprintcoachSWE !!

Always good to see confirmation of the data/concepts.

Huge fan of your work!

[Håkan Andersson @sprintcoachSWE]

I hear you @KenClarkSpeed

[SimpliFaster @SimpliFaster]

Rapid Fire: 60(ish) seconds of complex topics made simple with @korfist & @KenClarkSpeed .

Ken Clark breaks down how to measure vertical force production. No force plates embedded in your track needed!

[Sprint Science @spikesonly]

Thank you, @zentrumsport and @KenClarkSpeed, for the recent research that is guiding the football project.

Tangential Foot Speed
Structural Transfer
Fluid Conditional Logic
Practical use of IMUs

If you are stuck on single magic bullet ideas with exercises or drills, move on.

[Ken Clark, PhD @KenClarkSpeed]

@spikesonly Excellent point and analogy

[Ken Clark, PhD @KenClarkSpeed]

2025 was an incredible year with so many awesome opportunities and a lot to be thankful for. I’m very appreciative that my position at West Chester University allows me to teach, conduct research, coach speed, and consult. Thank you to everyone who made this year possible!

[Garnet Valley Football @GarnetValleyFB]

Congratulations to our 2025 All-Central League Players!

[JB Morin @jb_morin]

🚨NEW PAPER🚨
Resisted sprinting ➡️different sprint mechanics and running speed BUT when compared at the same🏃‍♂️speed, differences are only minor🧐
Confirms & extends results of 2 recent 📄
https://t.co/KSiUbqV2q2
👏@ssilva_edson & al.

[Garnet Valley Football @GarnetValleyFB]

GV Football is excited to announce Coach Chris Quintans as the new Defensive Coordinator! Coach Quintans has been on the defensive staff since 2022 as our Safeties Coach and has been a vital member of our staff! Congratulations Coach Q, we are excited for you!

[Ken Clark, PhD @KenClarkSpeed]

TORQUE AT THE HIP,
FORCE AT THE GROUND!

[Universal Speed Rating @universal_speed]

What makes fast people fast?

@KenClarkSpeed joined @les7spellman and @danny_ruderock on the Speed Lab Podcast a few episodes ago to break it down!

Full episode below🎧

[JB Morin @jb_morin]

🚨NEW PAPER🚨
Sprint acceleration mechanics in Division 1 college American Football players🏈
Initial sprint kinetics, kinematics and correlation with performance metrics by position/line
Well done @CoachJosse👏 @KenClarkSpeed &al in @JSportsSci more soon
https://t.co/Lvp5FSbTsz