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Physiology of Playing LB

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Mike Sherels

on 7 March 2015

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Transcript of Physiology of Playing LB

THE PHYSIOLOGY OF PLAYING LINEBACKER
A BIOMECHANICAL EVALUATION
-MIKE SHERELS
MIKE SHERELS
Current graduate assistant coach working with linebackers
Played LB at Minnesota from 2003-2007
S
S
C
C
E
E
T
T
LB
LB
LB
THE BASICS
OFFENSE
DEFENSE
POSITION SPECIFIC ABILITY
Sports Car
Suburban
SUV/Hybrid
Fast
Tight Turns
Change of Direction
Accelleration
Slower
Wide Turning Radius
Powerful
Slow Accelleration
Blend of Power and Speed
Defensive Back
Defensive Line
Linebacker
FOOTBALL vs. CHESS
FUNCTIONAL MOVEMENT SCREEN
Tests the athletes ability to control their body through a wide range of motion. The goal of the test is to identify asymmetry in movements as early as possible and develop a plan to address them. The test is a joint by joint approach to measuring both mobility AND stability of the joints. Athletes are graded on a 23 Point scale that is an indicator of total joint laxity.
CONSISTS OF:
Overhead Squat
Single Leg Squat
Single Leg Stepover
Glute Ham Raise
OVERHEAD SQUAT - NICK RALLIS
NICK RALLIS
-True Freshman OLB
-227lbs
FMS SCORE 23/23
JACK LYNN - OVERHEAD SQUAT
JACK LYNN
-True Freshman MLB
-234 lbs
FMS SCORE 12/23
GLUTE HAM RAISES
NICK AND JACK
Good Form
Poor Form
ANKLE FLEXIBILITY
Lunge Test
Looking for ONE of the following:
"D" measurement from toe to wall of 4 inches
Angle of tibia to vertical of greater than 38°
AARON HILL ANKLE FLEX TEST
WHAT DOES ANKLE FLEXIBILITY HAVE TO DO WITH PLAYING FOOTBALL?
LB STANCE
Knee bend angle between 110° and 90°
No round in back
Toes pointed forward
Head up, eyes forward
Chest up
Hands loose
OBJECTIVES
Garner a better understanding of the physiology and biomechanics that go into playing linebacker
Identify ways to maximize on-field talent
Come up with a method that allows players to "self correct" eachothers form while on the field
COMBINE TESTING
UNIVERSITY OF MINNESOTA TESTING
In addition to the Functional Movement Testing, each player is put through traditional NFL combine testing with the exception of the 40 yd dash for which a 10 yd dash is substituted.
Following are the different tests and how they relate to LB play
40 yard Dash
The 40 yard dash measures a players straight-line speed. Measurements are also taken at 10 and 20 yard increments.
Top 4 LB scores:
PRO AGILITY SHUTTLE
Also called the "short shuttle" this tests a players ability to change direction and accelerate.
Top 4 LB scores:
3 CONE DRILL
Also called the "L" drill, this drill measures an athletes ability to turn corners while accelerating.
Top 4 LB Scores:
VERTICAL JUMP
Vertical jump measures an athletes vertical explosion from a resting position. It is tested using a VeriMax machine.
Top 4 LB scores:
BROAD JUMP
The broad jump measures an athletes ability to jump distance from a standing position. It correlates to explosiveness.
Top 4 LB scores:
SINGLE LEG SQUATS
SINGLE LEG STEPOVERS
THE FUTURE OF ATHLETE TESTING
That's right! The future of football testing is SCIENCE!
ESPN Sport Science as a predictor:
Correctly picked the last 3 Defensive Rookies of the Year in the NFL
Identified Colin Kaepernik as the top quarterback in the draft in 2010 despite 5 highly touted QB's being picked ahead of him
LOADING THE QUADS
QUADRICEPS
The quadriceps is a muscle group located in the upper leg surrounding the front of the femur. It consists of four muscles. Quadriceps is Latin for "four headed muscle of the femur."
FUNCTIONS OF THE QUADS
ADRIAN PETERSON
BARRY SANDERS
Aaron Hill 1.53
James Manuel 1.55
Jack Lynn 1.57
Lamonte Edwards 1.57
Aaron Hill 4.27
James Manuel 4.27
Lamonte Edwards 4.37
Nick Rallis 4.40
Aaron Hill 6.96
Lamonte Edwards 7.09
Dominic Schultz 7.18
Damien Wilson 7.26
James Manuel 37.5
Nick Rallis 36.5
Lamonte Edwards 33
Damien Wilson 33
James Manuel 10'3
Lamonte Edwards 10'1
Aaron Hill 9'8
Jack Lynn 9'7
NICK RALLIS ANKLE FLEX TEST
JACK LYNN ANKLE FLEX TEST
The Quadriceps muscles is used primarily in the game of football in order to absorb force in an eccentric load.

Players who are able to "load" their quads quickly and effectively are able to effectively play "faster" than those who struggle to do so.

This is more evident in offensive players such as the Vikings Adrian Peterson.
QUAD LOADING AND "TRIPHASIC" TRAINING
Tri-Phasic training consists of three parts: Eccentric loading, Isometric Loading, and Concentric Force development. The theory goes that the faster the Eccentring Loading phase happens, the faster the Isometric and Concentric force happen allowing the overall athletic movement to happen faster.
Peterson's ability to absorb force using his Quad muscles is one of the biggest reason he is one of the best backs of all time. Because he is able to Eccentrically load weight to decelerate, it speeds up the time he can then transition to Concentric production of force.
Barry Sanders was the original "Quad Loader," he was not as powerful or fast as Adrian Peterson which is what makes AP so special, however nobody could cut like Barry Sanders. When talking about the Eccentric, Isometric, Concentric "V" Barry's would be razor thin.
WHAT DOES THIS MEAN FOR A DEFENSIVE PLAYER?
TRAINING AND MEASURING
WANT MORE AP? OF COURSE YOU DO
Using Force Plates, or Force Platforms is the best way to measure Eccentric Quad Loading. By measuring ground reaction forces the Force Plates paint a picture of just how much force an athlete is producing during any specific movement or lift. Training using Force Plates allows an athlete to specifically train the Eccentric portion of a lift by being able to monitor and progress forces properly in real-time. Doing this will lead to greater results.
This angle was discovered by using EMG (Electromyography) to discover
the angles at which the body is most powerful while maintaining the ability to move in all directions.

EMG works by placing electrodes on the outsides of the leg. The electrodes then send back signals telling when the muscles are being activated.
ELECTROMYOGRAPHY
EQUIPMENT NEEDED FOR STATE OF THE ART SPORTS SCIENCE LAB
Force Plates
High Speed Cameras
Eye Tracking Software
VO2 Max Equipment
Motion Capture Equipment
Heart Rate Monitors
Body Scanner
GPS Trackers
Bod Pod
ESTIMATED COST OF STATE OF THE ART SPORT SCIENCE LAB:
$500,000
DYNAMIC CORRESPONDENCE
Dynamic Correspondence is a training method created by Dr. Yuri Verkhoshansky.






The method focuses on sport specific training in which each exercise being done mimics the key movement of competition.
JOINT LAXITY
Sport movement is similar to the movement of precision cars vs. trucks with force capacity. Functional range of motion at the joint level is predictable of sport movement and efficiency. Functional range of motion is essential to efficiency and speed of reactive movement. This range of motion is the driving force to our Functional Movement Screening.
This is the equivalent of our entire 24,000 square foot weight room and all of the equipment within.
COMBINE TEST RELEVANCE
In 2009 Joe Landers of Ourlads Scouting Service published his report entitled: Relevance of the Combine: Forecasting NFL Success with Physical Attribute Tests.
Ankle Flexibility
Trunk Push Up
Chin Up
Inverted Row
The test broke down how much each of the combine drills was a predictor of NFL success. He did this by charting and tracking NFL combine attendees from 2005-2008, he then tracked their NFL roster status and weighed them against others at their respective positions.
RESULTS
The results of the linebacker group was far from definite. There was no one drill that was a direct indicator of success in the NFL and the top drill as far as prediction goes (40yd dash) was only a 67% predictor of future success.
The study found that linebackers who exceeded peer average scores for three of the seven combine tests had the best chance of landing on an NFL roster. This is essentially common sense.
BROAD JUMP MECHANICS
VERTICAL MECHANICS
CONCLUSION
RESOURCES
STANCE BREAKDOWN
When a player gets tired, particularly at linebacker the natural tendency is to relax the muscles and joints. This leads to a lazy stance which does not lend itself to athletic movements.
Total breakdown
of the 110° limit
Hands resting
on knees
Aaron Hill Good Quad Load
James Manuel Choppy Feet
Lamonte Edwards Good Quad Load
James Manuel Bad
THANK YOU!
Presented By:
Identify a method of testing and finding athletes who are predisposed to positive traits from a biomechanical perspective
Identify both correct and incorrect form from a scientific viewpoint
Evaluate current methods of testing and discuss possible alternatives
A VISION FOR THE FUTURE
By adding a stripe on the pants and breaking the stripe at a 70° it will allow teammates to notice if the stripe is not parallel or sub-parallel before the ball is snapped. Breaking the stripe at 70° ensures that it will be parallel or less when the player bends to at least the 110° angle required for a good stance.
PLAYING WITH A LOW STANCE

Bennell, K. L., Talbot, R., Wajswelner, H., Techovanich, W., & Kelly, D. (1998). Intra-rater and Inter-tester reliability of a weightbearing lunge measure of ankle dorsiflexion. Australian Physiotherapy

Electromyography. In (2013). Wikipedia. Wikimedia. Retrieved from http://en.wikipedia.org/wiki/Electromyography

Manocchia, P. (2008). Anatomy of exercise: A trainer's inside guide to your workout. Buffalo, NY: Firefly Books Ltd.

Norris, M., & Siegfried, D. R. (2011). Anatomy and physiology for dummies. (2nd ed.). For Dummies.

Perry, D. (2013, 4 15). Interview by M Sherels []. Quad functions and explosive strength.




Boyle, M. (n.d.). A joint-by-joint approach to training. Retrieved from http://www.strengthcoach.com/public/1282.cfm

Brenkus, J. (Producer) (2013). Espn sport science:combine edition [Television series episode]. In Brenkus, J. (Executive Producer), ESPN Sport Science. Bristol, CT: ESPN.

Dietz, C., & Peterson, B. (2012). Triphasic training: A systematic approach to speed and explosive strength performance. (Vol. 1). Bye Dietz Sports Enterprise.

Griffiths, I. (2010, February 28). The lunge test; forget ankle range, think ankle stiffness. Retrieved from http://sportspodiatryinfo.wordpress.com/2010/02/28/the-lunge-test-forget-ankle-range-think-ankle-stiffness/

Landers, J. (2009). Relevance of the combine:forecasting nfl success with physical attribute tests. Ourlads 2009 NFL Scouting Report, doi: Revision 2.0

Starzynski, T., & Sozanski, H. (1995). Explosive power and jumping ability for all sports. Island Pond, VT: Stadion Publishing Company.

Verkhoshansky, Y., & Siff, M. (2009). Supertraining. (sixth ed.). Human Kinetics.

W Kong, K., & van Haselen, J. (2010). Revisiting the influence of hip and knee angles on quadriceps excitation measured by surface
electromyography.International SportMed Journal, 11(2), Retrieved from http://www.ismj.com/pages/311417173/ISMJ/journals/articles/Vol-11-No2-2010/hip-knee-angles-quadriceps.asp

Yessis, M. (2011). Explosive running for all runners: Sprinters through marathoners. (2nd ed.). Michigan: Ultimate Athlete Concepts.
Passive Resource
Actual Resource
Over the Course of this assignment I have learned many things that will ultimately make me a better coach. The number one thing that I've learned is that it is important to surround yourself with other coaches who know more than you do particularly when it comes to athlete development. Science is not a passion of mine, however football is, and I realize that the coaches of my generation that embrace the technological advances and knowledge available are going to be the ones who are the most successful. Finding quality people to place on your staff who not only have an extensive knowledge of physiology and biomechanics, but are also able to speak about their importance in layman's terms so the benefits will be known. The knowledge that I have gained over this past semester will be put to use immediately in my coaching and recruiting.
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