U4AOS1

Question 1

fitness components total

Answer 1

11 in total

Question 2

aerobic power

Answer 2

the maximum rate of energy production from the aerobic energy system. energy produced in the presence of oxygen.

Question 3

factors that affect aerobic power

Answer 3

size of heart
cardiac output
haemoglobin
age
gender

Question 4

size of heart (aerobic)

Answer 4

an anaerobically trained athlete will have a larger left ventricle and increased stroke volume.

Question 5

cardiac output (aerobic)

Answer 5

an increased Cardiac Output will improve aerobic power due to increase delivery of blood and therefore 02 and nutrients.
HEART RATE X STROKE VOLUME = CARDIAC OUTPUT
VO2 MAX = CARDIAC OUTPUT X AVO2 DIFFERENCE

Question 6

haemoglobin (aerobic)

Answer 6

levels will allow for increased oxygen carrying capacity.

Question 7

age and gender (aerobic)

Answer 7

aerobic power peaks age 30 and may deteriorate due to decreases in max HR, stroke volume and extraction of O2 at the muscle cell.

males have higher levels of aerobic power mostly due to a higher cardiac output

Question 8

body composition

Answer 8

body composition is defined as the percentage of fat, muscle and bone in the body.

Question 9

factors that influence body composition

Answer 9

age: as you get older the percentage of body fat will decrease as hormone production slows down.

gender: males typically have a lower body fat percentage than females.

Question 10

muscular strength

Answer 10

the maximum amount of force that a muscle can exert against some form of resistance in a single effort. It is the peak force that a muscle can develop

Question 11

factors that influence Muscular Strength

Answer 11

muscle action
fibre arrangements
muscular area

Question 12

isoinertial

Answer 12

muscle action where the load or resistance against the muscle is constant throughout the motion

Question 13

concentric

Answer 13

the muscles length decreases

Question 14

eccentric

Answer 14

the muscle length increases

Question 15

type 1 muscle fibres

Answer 15

red fibres (slow twitch)
large amounts of myoglobin
low force production

Question 16

type 2 muscle fibres

Answer 16

white fibres (fast twitch)
high force production

Question 17

length-tension relationship

Answer 17

muscles at their longest state have the lowest capacity to have the highest level of force production. muscles at their shortest state have the lowest amount of force production.

Question 18

speed of contraction

Answer 18

peak forces are developed at a slower muscular contraction velocity. at zero velocity the muscle is contracting isometrically and can produce a significant amount of force.

Question 19

factors that affect the speed of contraction

Answer 19

age and gender