Chapter 5 Flashcards

1
Q

Most distinct gender difference in thermoregulation

A

sweating

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2
Q

Women and sweat (2)

A

women sweat less, start to sweat at higher core and skin temps

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3
Q

Heat tolerance in men vs women

A

women have similar heat tolerance to men of the same aerobic fitness level

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4
Q

Body temp resulting in cellular death

A

113 degrees F

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5
Q

increase in plasma volume can be observed …

A

within 1 hour of recovery from 1st exercise session

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6
Q

plasma volume can increase to% in the 2 weeks of trainin

A

12 to 20%

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7
Q

Physical performance advantage of reduced blood viscosity

A

enhanced oxygen delivery to the active skeletal muscles because blood flow more easily through the vessels including the capallaries

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8
Q

Part of the heart enlarged with endurance training

A

left ventricle - responsible of propulsion of blood through arteries

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9
Q

Blood flow increases within _ of training

A

1 hour of recovery from 1st training session

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10
Q

Advantage of reduced blood viscosity

A

enhances oxygen delivery to skeletal muscle b/c blood flows easier through capillaries

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11
Q

Left ventricle wall thickness increases due to

A

resistance training - afterload

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12
Q

Left ventricle cavity increases in size due to

A

increase in plasma volume and diastolic volume

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13
Q

a-vO2 difference in trained individual

A

lower mixed venous oxygen content - greater oxygen extraction and distribution at tissue level

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14
Q

Resting heart rate decreases _BPM

A

10 BPM

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15
Q

Submaximal heart rate decreases _BPM

A

10-20 BPM

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16
Q

Increase in mitochondria size and #

2

A

enhances muscle’s ability to use oxygen and produce ATP via oxidation.
Has a glycogen sparing effect - use fat for fuel

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17
Q

decreased secretion at rest and and at the same absolute exercise intensity after training

A

Response to endurance training: epinephrine and norepinephrine

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18
Q

slight elevation during exercise to preserve blood glucose (stimulates FFA mobilization

A

Response to endurance training: cortisol

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19
Q

increased insulin sensitivity

A

Response to endurance training: Insulin

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20
Q

smaller increase in glucose levels during exercise

A

Response to endurance training: glucagon

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21
Q

no effect on resting values, less dramatic rise during exercise

A

Response to endurance training: growth hormone

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22
Q

DOMS associated with

A

tissue injury from eccentric force

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23
Q

Hypertrophy result of:

4

A

myobibrils, actin, myosin, sarcoplasm - increase in muscle protein systhesis

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24
Q

High intensity resistance training and speed work can result in (muscle fibers)

A

type I muscle fibers to convert to type IIa fibers

25
Q

Exercise intensity greater than 60% - energy source

low intensity energy source

A

muscle glycogen

liver glycogen

26
Q

skeletal muscle stores _ to _grams of muscle glycogen

A

300 to 400 gram

27
Q

liver stores _ to _ grams of glycogen

A

70 to 100 grams

28
Q

Changes to facilitate heat tolerance

3

A

increased plasma volume (supports increased SV)
decreased heart rate and core temp
increased sweat rate

29
Q

Muscle buffering

A

ability to neutralize lactic acid

30
Q

Yield point

A

trasition between original resting length and plastic stretch( new permanent set or deformation)

31
Q

Elastic limit

A

point at which tissue is stretched beyond the point where it can return to normal length after force is removed

32
Q

Autogenic inhibition inhibits

A

muscle spindle response - tension in muscle is temporarily inhibited allowing further muscle stretching

33
Q

reciprocal inhibition coinsides with neural inhibition of the

A

opposing muscle on the other side of the joint to facilitate movement (agonist and antagonist)

34
Q

client holds and resists the force provided by the trainer so that an isometric contraction occurs - 6 seconds - AUTOGENIC INHIBITION

A

Hold -relax technique

35
Q

client pushes against the force provided by the trainer so that a concentric muscle contraction occurs - AUTOGENIC INHIBITION

A

Contract -relax technique

36
Q

client hold and resists force, the concentric contraction added during final passive stretch
**most effective - AUTOGENIC AND RECIPROCAL INHIBITION

A

Hold-relax agonist contraction

37
Q

Type of stretching that protects joint attachments

similar to resistance training

A

active- isolated stretching

38
Q

High-force, short duration stretch =

A

elastic or short term deformation

39
Q

Low force, long duration stretch =

A

plastic or permanent lengthening

40
Q

Tissue viscoelasticity

A

property of tissues that allows them to exhibit both plastic and elastic behavior

41
Q

a hot/ humid exercise environment reduces _

environment produces: 2

A

body’s ability to lose heat

greater core body temp

sweat rate

42
Q

fick equation demonstrates

A

rate at which a person uses oxygen in their body

43
Q

A-VO2 difference: 2

A

difference in oxygen content between arterial blood and venous blood

*indication of how much blood is extracted into the capillaries

44
Q

SA node located

AV node located

A

superior wall of right atrium

floor of right atrium

45
Q

fiber hypertrophy

fiber hyperplasia

A

increase in muscle fiber size

increase in # of muscle fibers

46
Q

twitch

summation

A

motor units smallest contractile response

series of rapid stimuli - greater force production

47
Q

2 risks - 95 degrees and 40% humidity

A

heat exhaustion

heat cramps

48
Q

Risk with 85 degrees and 50 % humidity

A

no risk

49
Q

risk with 30 degrees and calm winds

A

no risk if dresses properly

50
Q

risk with 10 degrees and 10 mph winds

A

freezing of exposed skin

51
Q

increase in rate coding:

A

leads to faster peak force production in trained muscle

52
Q

decrease in parasympathetic activity causes _ HR

A

elevated

53
Q

lactate threshold =

A

VT1

54
Q

blood glucose fuels _ intensity exercise

A

low intensity

55
Q

muscle glycogen fuels_intensity exercise

A

high intensity

56
Q

during 1st hour of 1/2 marathon, carb metabolism =

A

muscle glycogen

57
Q

during _intensity plasma FFAs are primary source of fat energy

A

low intensity

58
Q

stretching technique that does not elicit stretch reflex

A

static stretching

59
Q

stretches held for 2 seconds

A

active isolated stretching