introduction to biomechanics force week 6. key content what is biomechanics? performance analysis...
TRANSCRIPT
INTRODUCTION TO BIOMECHANICS
FORCE
Week 6
Key Content
What is biomechanics? Performance analysis Equipment Benefits of biomechanics Force production Types of force Force summation
What is Biomechanics?
The study of how the physical laws of mechanics and physics apply to the ________ ________
Why?Improve ___________How injuries occurInjury ___________ and rehabilitationDesign and development of
___________
Performance Analysis
Evaluating quality of performance and developing better practices
Quantitative (main method) and qualitative
Permanent record (eg: video) Systematic observation of
performance Analysis of selected aspects
Equipment
Technologically driven Huge advances in recent years Read through information on page 51
Benefits of Biomechanics
Jot down some of benefits from page 51
Force Production
Force is any ___________ or ___________ activity that tends to alter the state of motion of a body
The body could be a human body, ball, discus, javelin, racquet, bat, etc
The force can get the body to: Move Speed it up Slow it down Stop Change direction
Types of Forces
Force without motion – isometric force Force with motion – isotonic force Sub-maximal force Maximal force
Force without Motion
Isometric force Isometric contraction Muscle length does not ___________
Eg: pushing against a wall, gripping a cricket bat
Force with Motion
Isotonic force Isotonic contraction Muscle length ___________ Changes the state of motion of the
object (body)Eg: shot put, taking a catch in cricket,
diving into a pool
Sub-maximal Force
Force needs to be at an optimal level for successful performance
Sometimes we want less than maximum forceEg: tennis drop shot, chip in golf,
basketball lay-up
Maximal Force
Some activities require maximal force for a higher chance of success
This usually happens through combination of a number of forces – force summationEg: high jump, javelin, throw from the
outfield in softball
Force Summation
Combination of forces to produce a maximal force
2 typesSimultaneously: explosive action of all
body parts occurs at the same time• Eg: high jump take-off, vertical jump for
rebound in basketball
Sequentially: body parts are moved in sequence to generate a great force
• Eg: throwing, striking, kicking
Simultaneously…sequentially
Sequential Force Summation
What are the 4 parts to a sequential force summation technique (page 54)
Write down (or draw) the steps in force summation for a throw from the outfield in softball
Homework Task
Answer the following questions1. Pick one benefit of biomechanics for a
sport of your choice and discuss in detail
2. For the same sport analyse and discuss in detail one form of equipment that has used biomechanics
3. Describe the sequence of body parts in the force summation for a tennis serve