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BIOMECHANICS OF TENNIS ELBOW. ERICA MICHELLE FERNANDES Friday, 26 March 2010. INTRODUCTION: Incidence:. Constitutes a sizeable percentage of elbow injuries Elbow problems occur atleast once in 40% to 50% of tennis players (George, et al.,2006). INTRODUCTION TO THE ELBOW JOINT.

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biomechanics of tennis elbow

BIOMECHANICS OF TENNIS ELBOW

ERICA MICHELLE FERNANDES

Friday, 26 March 2010

introduction incidence
INTRODUCTION:Incidence:
  • Constitutes a sizeable percentage of elbow injuries
  • Elbow problems occur atleast once in 40% to 50% of tennis players (George, et al.,2006)
common areas of inflammation
COMMON AREAS OF INFLAMMATION
  • SUPRACONDYLAR RIDGE & EPICONDYL FACETS
  • TENDON BODY
  • MUSCULOTENDINOUS JUNCTION
  • MUSCLE BELLY
equations of motion in tennis
EQUATIONS OF MOTION IN TENNIS
  • F+Fr=MdV/dt
  • Fb-Frh= Icmdw/dt
  • FrLf= Ifdwf/dt
  • Vp= Lfwf=hw-V
factors responsible for tennis elbow
Factors responsible for tennis elbow:-
  • Poor technique
  • Forced eccentric muscle contraction
  • Elbow Crunch
  • Wrist Crunch
  • Impulse reaction
  • Shock
  • Tip speed
elbow crunch
Elbow crunch

Before impact,

Centripetal force = centrifugal force

After impact,

Centripetal force > centrifugal force

Measured in Newton: 1N=0.225 lbs.

Formula: Shock*2/R’.

wrist crunch
Wrist crunch:
  • Measured from centre of mass to the wrist.

Formula: Shock*2/R”

(R” = distance from wrist to axis of rotation+ distance from axis to balance point.

shock
Shock:
  • Shock= difference between initial and final kinetic energies
  • Measured in joules
  • High shock is bad because it means high elbow and wrist crunch.
tip speed
Tip speed:
  • Low tip speed is better than a high tip speed.
  • better racquet control
  • more accurate

Impulse reaction:

  • Positive impulse is better since it leads to less impact force at the elbow joint.
factors to be considered to treat tennis elbow
Factors to be considered to treat Tennis elbow

Early phase of rehabilitation

  • R.I.C.E
      • PHASE 1
  • Goals: decrease inflammation and pain,

promote tissue healing, and retard muscle

atrophy. During the acute stage of your injury,

whether the medial or lateral elbow is affected,

follow the RICE principle:

phase 3
Phase 3:
  • PHASE 3
  • Goals: Improve muscular strength and endurance, maintain and improve flexibility, and gradually return to prior level of sport or high level activity.
  • 15 minutes forehand only
  • 30 minutes forehand only
  • 30 minutes forehand and two handed backhand
  • 45 minutes forehand and backhand
  • 45 minutes all strokes
  • Serve
  • Full play
  • Competitive play
measures to avoid tennis elbow
Measures to avoid Tennis elbow:

ERGONOMICS

  • Equipment modification

Head size

        • Weight of the racquet
        • Frame Stiffness
        • String tension
        • Racquet material
        • Grip size
        • Moveable mass racquet
  • Correct playing strategies
grip size
Grip size:

A grip too large or too small lessens control and promotes excessive wrist movement. To measure an appropriate grip size for your hand see image below