user avatar
Ken Clark, PhD
@KenClarkSpeed
PhD in Biomechanics, Researcher in Human Performance, Strength & Conditioning Coach (CSCS, USA-W), interested in all things SPEED
West Chester, PA
kenclarkspeed.com
Joined September 2014
1,885
Following
17.5K
Followers
Posts
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Feb 24, 2020
    During start & initial acceleration, better to focus on force application (push hard down & back) rather than trying to “run low” out of the blocks. (Credit Rae Edwards for sprinter example on left) #speed #acceleration #sprinting #sprinttraining #sport #sportscience
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Dec 12, 2020
    "BOUNCE, SCISSOR, STRIKE".... Using imagery to describe some key aspects of top speed sprinting. Inspired by some recent conversations with @NickWinkelman #speed #sprinting #maximumvelocity
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Feb 22, 2020
    This graphic illustrates some of the basic technique differences between competitive sprinters and non-sprinters. (Images from ⁦@LocomotorLabSMU⁩ with ⁦⁦⁦@Dr_Weyand⁩ ). #sport #sportscience #speed #speedtraining #sprinting #sprinttraining
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Apr 6, 2022
    Happy to post this ~2 minute video on the biomechanics of Maximum Velocity Sprinting as part of #NationalBiomechanicsDay @BiomechanicsDay. Enjoyable to explore the combination of science and athletic performance through the lens of #SPEED @ISBiomechanics
    00:00
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Dec 21, 2022
    "BOUNCE, SCISSOR, STRIKE".... Using imagery to describe some key aspects of top speed sprinting. #speed #sprinting #maxvelocity
    59K
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Dec 27, 2015
    Love foot-swing graph in @jb_morin new study. Same movement signatures separate Elite vs Avg at VMax too (SMU video)
    00:00
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Nov 19, 2019
    From ⁦@WCUofPA⁩ Human Performance Lab: synchronized force-motion video of track block start. Vertical force in blue, horizontal force in red. Thanks to ⁦@Sp0rtScienceGuy⁩ for generating video, @marshall_lane for data collection, and ⁦@DruDaVinci⁩ for sprint demo
    00:00
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Mar 3, 2020
    When analyzing short sprints like the NFL Combine 40-yard dash, interesting to note that even fastest athletes approach top speed (> 90% Vmax) relatively early in sprint. Based on Clark et al (2019), JSCR. #speed #acceleration #sprinting #sprinttraining #sport #sportscience
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Feb 23, 2020
    Force production in sprinting is generated proximally & transmitted distally via stiff lower limb. This concept aligns with 2-Mass Model (Clark, Ryan, & Weyand, 2017). Images from ⁦@LocomotorLabSMU⁩ with ⁦@Dr_Weyand⁩. #speed #sprinting #sportscience #biomechanics
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Mar 20, 2020
    Three notes: (1) even in elites who strike on ball of foot, heel may touch ground during mid-contact (2) not possible for initial contact under COM at Vmax, but good aiming point (3) space between knees perhaps best used during video review as indicator of leg recovery mechanics
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Aug 20, 2020
    Excited to announce the launch of kenclarkspeed.com Our goal is to serve as a resource for athletes, coaches, and sports scientists Check it out! #biomechanics #speed #sprinting #acceleration #maxvelocity #sports #sportsscience #strengthandconditioning
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Mar 17, 2020
    During top speed sprinting, aim to limit excessive thigh swing behind the body during the leg recovery phase Credit to Rae Edwards @monzavous⁩ for sprinter example on the left. #speed #sprinting #sport #sportscience #biomechanics #_trackandfieldforever_
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Mar 15, 2020
    One of most important aspects of top speed sprinting is posture. Relatively upright posture with neutral hips allows other top speed mechanics to be correctly executed. Images: ⁦@LocomotorLabSMU⁩ w/ ⁦@Dr_Weyand⁩ #speed #sprinting #sport #sportscience #biomechanics
  • user avatar
    Ken Clark, PhD
    @KenClarkSpeed
    Nov 25, 2019
    From @WCUofPA Human Performance Lab: synchronized force-motion video of Step 2 of a sprint acceleration. Vertical force in blue, horizontal force in red. Thanks to @Sp0rtScienceGuy for generating video, @marshall_lane for data collection, and @DruDaVinci for sprint demo
    00:00