Ken Clark, PhD
@KenClarkSpeed
PhD in Biomechanics, Researcher in Human Performance, Strength & Conditioning Coach (CSCS, USA-W), interested in all things SPEED
The @KenClarkSpeed contact length ratio education is very useful if you know how to interpret the data. My main issue is the ability to drill down, as it's very labor-intensive and subject to seasonal changes and differences in practice versus meets. Only use validated data!
Hip torque for the win!
When @KenClarkSpeed released his paper on thigh angular velocity, it got into some heavy math. The illustration reminded me of the 1997 Training for Speed book, & I thought of hip torque calculations from 2003 when I was editing the Forum review with @DerekMHansen years ago.🧵
When @KenClarkSpeed released his paper on thigh angular velocity, it got into some heavy math. The illustration reminded me of the 1997 Training for Speed book, & I thought of hip torque calculations from 2003 when I was editing the Forum review with @DerekMHansen years ago.🧵
7 years ago today, @KenClarkSpeed presenting at TFC-2018.
fun times!! that was a great clinic
7 years ago today, @KenClarkSpeed presenting at TFC-2018.
Congratulations to Derrick Lukomski-Pizzo and Will Rivers on earning USTFCCCA All-Region honors! Story ⬇️ 📰:wcupagoldenrams.com/news/2025/5/16…
Congratulations to Annika Hummel and Lily Palacio Lewis on earning USTFCCCA All-Region honors! Story ⬇️ 📰:wcupagoldenrams.com/news/2025/5/16…
Congratulations to Lily Palacio Lewis on bringing home PSAC titles in both the 100 and 200 and Morgan Pera on earning All-League honors in the 100 hurdles! Recap a great final day in Slippery Rock ⬇️ 📰:wcupagoldenrams.com/news/2025/5/10…
🚨 Why you can't sprint About an hour into a conversation with Dr. Andrew Huberman on his podcast, Stu McMillan made a bold claim: “You can’t sprint.” He was half-joking. But the point stands—for Andrew, and for almost everyone in the general population. It’s not that they…
The @KenClarkSpeed study illustrated some great points to velocity versus technical considerations. How to use this information? Model your program don’t sprint profile! Map out how you take testing and training data and modify the workouts. Forecasting speed is key.
Sagittal Closed Footpath- The key to running faster is application of force based on the athlete’s abilities. Coordination, eccentric RFD, and body structure determines this and we tend to see coaches focus on cues and drills to problems instead of anatomy and capacity. A 🧵-
**MANUSCRIPT PUBLISHED ONLINE (FREE OPEN-ACCESS)** Clark, K. P., Meng, C. R., Walts, C. T., Ryan, L. J., & Stearne, D. J. (2025). Angular kinematics during top speed sprinting in male intercollegiate track and field and team sport athletes. Frontiers in Sports and Active Living,…
Tangential Foot Speed versus Horizontal Speed in longer sprints...
We have taken a deep dive into SMAS scores and how they relate to PSR. The results are probably what you expect! @coachrgrubbs @vuemotion @chrisbramah @KenClarkSpeed @jb_morin @zentrumsport @speed_works_ @SpeedSolutions_ @SportsmithHQ
‼️Speed testing can waste time if misused. ✅Instead, assess sprint gate health—this should automatically develop performance. If not, something’s off. We all have step asymmetries—one leg pushes, the other prepares. Normal. But elite loads can compress joints/pelvis and…
Tangential Foot Speed- If you read the @KenClarkSpeed study on ground speed compared to horizontal foot speed (negative) the relationship is very clear, if you don’t have the juice, it’s hard to run faster due to braking. The key is hip torque, and even elites are deficient. 🧵
🚨Sprint running mechanics are associated with hamstring strain injury. ⚠️Higher scores in the S-MAS➡️new HSI. ‼️1-point increase in the S-MAS➡️33% increase HSI rate. @chrisbramah is changing the game👏 ✅The S-MAS can be easily measured in @MyJumpLab bjsm.bmj.com/content/early/…
🆕‼️ Sprint Running Mechanics & Hamstring Injury Risk ‼️🆕 Our latest research in @BJSM_BMJ explores whether sprint mechanics are linked to past and future hamstring injuries in professional footballers. What did we find? And why does this matter? 🧵👇 bjsm.bmj.com/content/early/…
**NEW MANUSCRIPT ACCEPTED** Angular Kinematics during Top Speed Sprinting in Male Intercollegiate Track and Field and Team Sport Athletes. Journal: Frontiers in Sports and Active Living (section: Elite Sports and Performance Enhancement) by KP Clark, CR Meng, CT Walts, LJ…
Off my Twitter hiatus to say this: I was really honored to be invited on to the @hubermanlab podcast. A really enjoyable couple of days. I hope you dig it! youtube.com/watch?v=U3cSnz…