1. Bowls Coaching Technique Analysis

2. Technique analysis SPORT BIOMECHANICS
Description of movement patterns
Performance
Efficiency
Injury prevention
Tools: Video Camera

3. Concerned with the internal and external forces on the body
Sports Biomechanics ?
Sports Biomechanics ?
Concerned with the internal and external forces on the body
Internal
External

4. The Coach & Biomechanist Biomechanist can assist with.
A coach must be able to:
1. Identify movement features and deviations
2. Describe positions, phases & actions
3. Explain causes & mechanisms
4. Predict effects & techniques
5. Recommend physical or technical corrections
6. Coach the athlete to make these changes
Biomechanist can assist with.

5. How do we measure?
2D video analysis

6. What do we measure? Body positions Segment sequencing Distance Speed
Range of motion
Acceleration
Force / Torques
Impacts
Strength
Rotational motion
Anthropometry
Muscle activity
What do we measure?

7. Force – Motion relationship=
Motion
Force x
Time
(mass)

8. Force – Motion relationship=
Motion
Force x
Time
(mass)
Increased transfer of body weight
Increased trunk lean
Use of gravity
Larger step
Higher backswing

9. Delivery – timeline breakdown
Setup – hold and address
2. Trunk initiation
3. Backswing
…(initiate step)
4. Top backswing / start forward swing
…(Heel of leading leg planted)
5. Forward swing
6. Bowl release
7. Follow through
THEY ALL
INTER-RELATE

10. How do we analyse a delivery
Identify the problem areas, after you have broken the delivery down into key events and phases, and have viewed video frame by frame.
Work BACKWARDS – the inefficiencies will be caused by the preceding phase(s).

11. Principles of movement - SOME FOCUS AREAS
Trunk action generating momentum
Appropriate step width and length
Line of the bowl arm
Timing of lead leg plant with start of forward swing
Weight transfer / body position changes setting up bowl release

12. DRIVE

13. DRIVE

14. DRIVE

15. Step Length
Step length

16. Arm position at top of back swing Arm position at top of back swing
DRIVE
+ 28 deg
- 14 deg

17. Arm position at top of back swing
DRIVE
+ 28 deg
- 44 deg

18. Arm position at top of back swing
DRIVE
+ 28 deg
- 20 deg

19. Trunk position at bowl release

20. Feedback sheet…