presentation reaction and ideal weight

8/14/2019 Presentation Reaction and Ideal Weight

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REACTION TIME

COOPER METHODFOR DETERMININGIDEAL WEIGHT

GROUP CANDY CRUSH


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Reaction Time Definition

The interval of time between application of a stimulusand detection of a response.

An ability to react shows how quickly and effectivelyher or she can make decisions and initiate actions.

Reaction time is a measure of how quickly anorganism can respond to a particular stimulus.

Factor affect reaction timeage, gender, physicalfitness, fatigue, distraction, alcohol, personality type,and whether the stimulus is auditory or visual.


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Reaction Time Measurement

Ruler catching method Subject hold out the chosen hand and extend the thumb

and index finger8 cm apart

Accomplice hold a metric ruler with its end exactly evenwith the subject extended thumb and index finger.

The ruler is dropped and the subject grasps it between thethumb and index finger.

Record the number at the subject fingertips.

Calculate the time it took for the subject to react andcatching the ruler with this following formula:

d(in cm) = (1/2)(980cm/sec) d = distance

t = d/(490cm/sec) t = time


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Tips to Improve Reaction Time

1. Study Opponents' Patterns.Understanding opponents'capabilities, skills, and preferences can narrow the number ofchoices and appropriate responses to their moves.

2. Identify Cues.Spotting cues from opponents can telegraph

their next move. Responding to cues narrows the choice ofresponses and speeds up decision making.

3. Practice Responding to Different Competitive Conditions.Theamount and quality of practice can reduce the amount oftime it takes for an athlete to make an appropriate decision.


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4. Anticipate Opponents' Actions.An athlete's ability to predictwhat an opponent will do in certain situations and when theywill do it speeds up planning and decision making.

Athletes intending to deceive opponents can use anticipation

to their advantage by making movements unpredictable. Ifopponents are unable to anticipate a move, processing aresponse is slower.


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5. Find the Optimal Performance Zone. Reaction time anddecision making are influenced by how aroused or stressedathletes are. Athletes at a high arousal level may detect alimited number of signals because their focus narrows.

Coaches can help athletes maintain an optimal arousal levelthrough the use of breathing exercises, progressive relaxation,visualization, and meditation skills. Achieving the "zone"promotes effective information processing, minimizing theadverse influence of high level competition on decisionmaking.


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Reaction Time

Q) Define reaction time? (1 Mark)A) The time from the stimulus occurring to the performerstarting to move in response to it.

Q) What is movement time? (1 Mark)

A) The time it takes from starting the movement tocompleting the movement.

Q) Explain what is meant by response time. (1 Marks)A) Response time is from the onset of the stimulus to the

completion of the movement.


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Reaction Time

Sporting Example:100m sprint - Sensors recognize sounds ofthe gun and messages are sent to the brain via vertebrae(reaction time), the performer leaves the blocks and sprintsto the finish line (movement time) = Response Time

Put simply, response time is the time taken for the performerto fully respondto a stimulus.
http://2.bp.blogspot.com/-uDBcDaigc3s/UUIEsYLBZnI/AAAAAAAAAHE/8IYkUbpoGDE/s1600/Untitled.png


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Reaction Time

Q) Explain what is meant by simple reaction time and give apractical example of the simple reaction time in sport (2Marks)

A) A simple reaction is where one stimuli is detected andone response is given. For example the gun start in a 200m

sprint and the performer sprinting. Q) Define choice reaction time (1 Mark)

A) Several stimuli are given but only one must be selectedfor response.


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Reaction Time

Q) Identify and explain three factors that can influence aperformer's reaction time (3 Marks)A) 1. Age - reaction time deteriorates with age2. Gender - Males have a faster reaction time than females3. Previous Experience - Experience of a skill speeds up

reaction time Other factors that can affect a performer's reaction time

are:

Warning Signals

Anticipation

Body Temperature Personality

Substances e.g. drugs, alcohol

Limbs Used


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Reaction Time

Q) State three ways of improving response time.A) 1. Warm - up2. Mental rehearsal3. Practice

Other ways of improving response time include: Stimulus-response compatibility

Anticipation

Experience

Level of arousal/motivation

Concentration

Develop physical fitness

Early cue detection


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Cooper Method

Used to calculate the ideal weight for men andwomen when body fat cannot be estimatedthrough skinfold measurements.

Male: (4 x height in inches)128 = weight with

roughly 15 to 19 % body fat Female: (3.5 x height in inches)108 = weight with

roughly 18 to 22 % body fat

Large boned individuals should add 10 % to the

calculated figure.

Small boned individuals should subtract 10 % tothe calculated figure.


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Cooper Method Samples

1 kg = 2.2046 pounds 1 meter = 39.37 inches

sample data

Sample Gender Height in meter(inches)

1 Male 1.71 (67.32)

2 Male 1.67 (65.75)

3 Female 1.56 (61.42)

4 Female 1.49 (58.66)


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Cooper Method Sample Data

Male: (4 x height in inches)128 = weight withroughly 15 to 19 % body fat

Sample 1: (4 x 67.32)128 =141.28 pound (64kg)

Sample 2 : (4 x 65.75)128 = 135.00 pound (61kg)

Sample 1

Large boned add 10%

141.28 = 155.41pound (70kg)

Small boned subtract 10%

141.28 = 127.15pound (58kg)


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Cooper Method Sample Data

Female: (3.5 x height in inches)108 = weight withroughly 18 to 22 % body fat

Sample 3 : (3.5 x 61.42)108 = 106.97pound (48kg)

Sample 4 : (3.5 x 58.66)108 = 97.31pound (44kg)

Sample 3

Large boned add 10%

106.97 = 117.67pound (53kg)

Small boned subtract 10%

106.97= 96.27pound (44kg)

presentation reaction and ideal weight

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