SPORT PERFORMANCE

Question 1

what are the variables related to athletic performance

Answer 1

1. vo2 max
2. genetics
3. lactate kinetics
4. economy
5. muscle fibre types

Question 2

define the VO2 max

Answer 2

this is the maximum amount of oxygen one consumes during prolonged periods of high intensity exercise
- it is a good indicator of your current fitness

Question 3

what is the relationship between oxygen uptake and power output

Answer 3

as your oxygen consumption increases over time; so does your power output

Question 4

what effect does training have on your VO2 max

Answer 4

a trained individual will have a greater VO2max and will have greater economy ie; to generate the same run speed/ intensity output as an untrained individual; they will use less 02
- so training lowers your oxygen needs for the same effort = good economy
-thus; a trained individual with a good economy will reach their VO2 max at a greater run speed/intensity so they can exercise to greater intensities before fatiguing

Question 5

what is the fractional utilization of VO2 max

Answer 5

the FU of VO2 max is the percentage of your vo2 max that you can sustain during an event
-trained athletes like endurance runners are able to sustain a greater percentage of their v02 max for long periods of time
-a high FU would mean someone is exercise near their maximal capacity

Question 6

what is lactate threshold

Answer 6

this is the point at which your blood lactate levels begin to increase exponentially during exercise of increasing intensity
-when this exponential increase point is reached; it means lactate can no longer be cleared as fast as it is being produced

Question 7

what affect does training have on your lactate threshold

Answer 7

-training delays/ increases your lactate threshold so it is reached at greater intensities ie; you are able to exercise to a greater intensity before your lactate threshold is reached
-training does this by increasing the clearance of blood lactate

Question 8

what is the relationship between VO2 and lactate production

Answer 8

-VO2 increases with increasing exercise intensity and so does lactate and so there is a direct linear relationship between O2 consumption and lactate build up

Question 9

what are the 3 muscle fiber types

Answer 9

1. type 1- slow oxidative
   -high mitochondrial density
2. type 2a- fast twitch
   -oxidative glycolytic
3. type 2b- fast twitch
   -glycolytic
   -low mitochondrial density

Question 10

what are the adaptations to these muscle fibre types

Answer 10

-with training we see a transition of type 2b fibres to type 2a fibres ie; the more oxidative kind
-also see hypertrophy of the muscle fibres

Question 11

what role does genetics play in your athletic performance

Answer 11

a persons potential for success depends on the level of adaptability possible in their physiological paraments like muscle fiber type, VO2max, economy