1 / 12

The Biomechanics of Punching

The Biomechanics of Punching. Vincent Bradbury Andrew Calogero John Filostrat Charles Henkel Kevin Holly Mary-Anne Nguyen. Outline. Background Materials and Methods Accelerometer Foot-force plates Video Analysis Results Analysis Conclusion . Background.

kare
Download Presentation

The Biomechanics of Punching

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. The Biomechanics of Punching Vincent Bradbury Andrew Calogero John Filostrat Charles Henkel Kevin Holly Mary-Anne Nguyen

  2. Outline • Background • Materials and Methods • Accelerometer • Foot-force plates • Video Analysis • Results • Analysis • Conclusion

  3. Background • Martial arts have been practiced for hundreds of years • The key to success in martial arts is to master proper techniques • Our study will provide a focus on the effectiveness of using proper technique while performing a rear-cross punch   

  4. Materials • Wood frame & sand bag • Accelerometer • Context Logger • Foot-Force Plate • Kistrel Piezoelectric Force Plates • BioWare Software Package • A-D hardware and Computer • Video Analysis • iPhone • Reflective body markers • Background length markers http://www.mobilewhack.com/wp-content/images/2009/02/iphone_video.jpg

  5. Method • Proper technique • subject stood on the foot-force plates on the balls of his feet and front hip pointed toward the bag • Punching by twisting the hips and shoulders forward while pushing off of the back-foot to drive the fist forward • Improper technique • subject first stood on the foot-force plates with flat feet and hips facing the bag • Punched the bag with full force using his shoulder

  6. Results: Accelerometer

  7. Analysis: Accelerometer

  8. Results: Foot-Force Plates

  9. Analysis: Foot Force Plates • Peak of the total ground force reaction was calculated by finding the instantaneous vector forces of the Fx, Fy, and Fz

  10. Results: Video Analysis

  11. Analysis: Video Analysis • Initial velocity after the punch • Mgh=0.5mv^2 • V=sqrt(2gd) • Distance traveled by the bag • Arc length=(θ/360)2*π*radius ,where θ is the angle in degrees

  12. Conclusion • Accelerometer • Improper technique has an average force that is a bit lower than the average proper punch forces • Maximum improper force is actually greater than the minimum proper force • GRF that was observed during this strike may also show a smaller reaction for from the punch • Foot force plate • More twisting involved during the proper technique • Proper technique enhances the force available to give off in the x-y plane based on Newton’s third law of motion. • Video analysis • Video recorder captured each punch at an angle not perpendicular to the plane of action • Scaling every dimension to the six inch reference marking behind each shot • To reduce error in a hypothetical duplicate lab, a camera stand and highspeed camera faced directly into the plane of action

More Related