Dr. Kwon’sGolf Biomechanics Instructor Training

Level 1

Young-Hoo Kwon, Ph.D., FISBS• Professor of Kinesiology• Director of Biomechanics Laboratory

Texas Woman’s University, Denton, TX, USA

Employment• Associate & Full Professor, Dept. of Kinesiology, Texas Woman’s

University, Denton, TX (2002-)• Assistant & Associate Professor, School of Physical Education,

Ball State University, Muncie, IN (1997-2002)• Senior Researcher, Biomechanics Dept., Korea Institute of Sport

Sciences, Seoul, Korea (1993-1997)

Dr. Kwon’s Bio

Professional Activities• Life Member & Fellow, International Society of Biomechanics in Sports• Editor in Chief, Sports Biomechanics (2007-2014)• VP of Publications (2002-2007) & Director (2008-2014),

International Society of Biomechanics in Sports• Developer, Kwon3D Motion Analysis Suite (1991-)

Dr. Kwon’s BioPGA/Champions Tour

Tommy Armour IIIAaron BaddeleyMark BrooksBrad ElderJ.J. HenryMark HensbyCharles Howell IIITrevor ImmelmanLucas LeeRichard LeeJamie LovemarkScott StallingsDaniel SummerhaysTyrone Van AswegenGrant WaiteTim WilkinsonYE Yang

Long Driver

Jamie Sadlowski

LPGA/KLPGA Tour

NaYeonChoiJulieta GranadaHye Youn KimSo Young Kim 2Sue KimMeena LeeMi Hyang LeeSaehee SonJennifer SongMarissa Steen

+ Numerous Web.com Tour, Sy-metra Tour, mini tour, collegiate, and junior players

+ Numerous teaching professionals

Golf Swing Motion Analysis

Objectives

• To introduce basic mechanical quantities/concepts relevant to golf swing

• To introduce key biomechanical principles of human movement• To provide a firm mechanical/biomechanical framework of the

“mechanically good golf swing”

Class 1: Introduction

• Orientation• Golf swing biomechanics• Main themes & expected outcomes• Kinematics vs. kinetics• Types of motion

- Linear- Angular- General- Analysis strategies

• Scalar vs. vector- Vector addition/subtraction- The tip-to-tale method- Vector components

• Swing events & phases

Class 2: Basic mechanical concepts

• Mass- Center of mass (CM)

• Force- Properties - Various forces - Pressure

• Moment of force- Moment arm- Moment vs. moment arm

• Types of force• Mechanical system & external force• Force-force vs. force-moment approach• Newton’s laws of motion

- Inertia- Acceleration- Reaction

Dr. Kwon’s Golf Biomechanics Instructor Training Level 1

Class 3: Golfer’s body

• Degrees of freedom (DOFs) in the golfer’s body

• Joint flexibility and range of motion • Types of muscle contraction• Hill’s muscle model • Force-length relationship • Force-velocity relationship • Force-time relationship • Stretch-shortening cycle • Countermovement • Muscular strength, endurance, and

power

Class 4: Linear kinematics

• Degrees of freedom (DOFs)• Position & relative position• CM of the golfer’s body• Trajectory & displacement Velocity &

speed• Acceleration

- Interpretation- Tangential vs. normal acceleration

• Body CM motion• Change of direction motion

Class 5: Functional swing plane

• Popular swing planes- Ben Hogan- Hank Haney- Jim Hardy - Double-pendulum & triple-pendulum

• Functional swing plane (FSP) - Clubhead trajectory plane- Properties- Position of FSP- Moving reference frame

• Swing style classification based on FSP • Popular models revisited • Motion planes (MPs) of the joints • Upper body- vs. lower body-dominant

swing

Class 6: Angular kinematics

• Functional double-pendulum (FDP)- On-plane motion

• Angular position- X-factor & shoulder/hip line angles- Upper and lever angles- Motion range

• Angular velocities• Kinematic sequence• Angular accelerations• Club motion: linear vs. angular

- Radian- Displacement & velocity relationships - Acceleration relationship

Class 7: Linear & angular kinetics

• Ground reaction force- Ground reaction force (GRF)- Center of pressure (CP)- Ground reaction moment (GRM)

• Foot-ground interaction- GRF moments- Pivoting & foot contact moments

• Analysis of the stepping drill• Moment of inertia

- Radius of gyration- Club

• Momentum- 2nd law revisited- 1 st law revisited – momentum conservation- Club- Local & remote angular momentums

• Impulse• Newton’s equation of motion

- Golfer + club- Club- Lower body – inverse dynamics

• Ground-up vs. core-down?• Angular momentum generation vs.

transfer

Summary and Closing

• Mechanically natural/good swing?• Q&A

Day 1

8:30-9:00a Registration9:00-10:20a Introduction10:30a-12:20p Basic mechanical concepts12:30-1:30p Lunch1:30-2:50p Golfer’s body3:00-4:20p Linear kinematics4:30-5:50p Functional swing plane

Day 2

9:00-10:20a Angular kinematics 10:30a-12:20p Kinetics 112:30-1:30p Lunch1:30-3:20p Kinetics 23:30-4:00p Summary and closing

COURSE SCHEDULE LEVEL 1