Factors affecting training performance Flashcards
what is the alactatcid ATP/PC system
after movement, ATP forms ADP
creatine phosphate is broken down to form creatine and phosphate and when combined with ADP it forms ATP
what sport is the alactatcid ATP/PC system best suited for
due to the high speed of ATP production and the short duration of the fuel, ATP/PC is dominant for activities that require explosive muscular contractions over short times such as;
- 100m sprint
- discus
- javelin
- high jump
The ATP/PC ATP production is
- very fast
- lasts for a very short time
- limited store of fuel
duration the ATP/PC can operate for + cause of fatigue
- fuel will be depleted in 8-12 seconds
- -> creatine phosphate can be fully restored within 2 minutes (30sec-2minutes)
- near maximal effort, fatigue is caused by inability to continually resynthesises ADP from CP because CP is quickly exhausted
- -> why we are unable to run at maximal effort for longer than 100m
what is the lactic acid system
after 8-12 seconds of maximal exercise and Cp supplies are exhausted, ATP will still need to produce energy where sufficient oxygen is not available for longer duration sports. the body needs a different fuel such as immediate sugar levels (glucose) that are circulating in the blood, liver and muscles
- excess glucose stored in liver or muscle is called glycogen
- process of using glycogen or glucose as fuel is called glycolysis
what sport best suits the lactic acid system
- 200-400m run
- 50-100m swim
- tennis : running back and forth with small breaks in between
- rugby league : repeated tackles
- soccer : full-back going forward in an attack and backwards in a retreat
the lactic acid production is
- very fast productions
- lasts for short duration
provides ATP quickly but with high quantities of glucose
E.g. 3 moles of ATP is generated from the breakdown of 180 grams of glycogen during anaerobic glcolysis
duration lactic acid can operate for
30seconds - 3minutes
cause of fatigue in lactic acid system
when lactic acid levels build up within muscle cells. it is caused by the rate of lactic removal because it is accumulated quicker than it can be removed
- high levels of lactic acid can cause deterioration in performance but moderate ones enhance performance as lactic acid is a source of fuel
lactic acid = lactic ion (lactate) and hydrogen ion
–> hydrogen is the acid part that impairs body from performing
–> lactate is fast fuel because it is easy to remove from blood
process of recovery + rate of recovery for lactic acid
ROR : 30-60mins
post exercise : lactic acid diffuses from muscle into bloodstream, where in the liver it is reconverted into glycogen and can be used again as fuel
what is aerobic system
physical activity which lasts longer than a minute requires the presence of oxygen-rich blood to continue muscular contractions
–> called aerobic metabolism because glucose (carbohydrates, sugar) and fat (sometimes protein) is broken down in the presence of oxygen to produce ATP
sports best suited for aerobic systems
- marathon runners
- cycling
- triathlons
- netball, soccer, rugby
the aerobic energy production is
- very efficient
- produces many ATP for long time
E.g. able to produce 39 moles of ATP with 180grams of glycogen
duration aerobic energy system can operate for
60 min +
- elite athletes are able to mix carbohydrates and fat in endurance events (this is called glycogen sparing) which results in fat being used earlier so that glycogen can be available later for potential sprints at the end
source of fuel for ATP/PC, lactic and aerobic
ATP/PC : ADP + PC
lactic acid : carbohydrates
aerobic : carbohydrates, fats, protein
cause of fatigue in aerobic system
- decrease of blood glucose and muscle glycogen
- when there is an exhaustion of carbohydrates and fat becomes the predominant fuel, it is called ‘hitting the wall’
fatigue happens because fat requires more oxygen for metabolism of energy
–> increases temperature + respiratory rate for athletes
cause of fatigue in aerobic system
- decrease of blood glucose and muscle glycogen
- when there is an exhaustion of carbohydrates and fat becomes the predominant fuel, it is called ‘hitting the wall’
fatigue happens because fat requires more oxygen for metabolism of energy
–> increases temperature + respiratory rate for athletes
process of recovery for aerobic system
ROR : 12-48 hours
restoring of fuels + aerobic glycolysis
what are the principles of training
- progressive overload
- specificity
- variety
- reversibility
- training threshold
- warm-up cool-down
what is progressive overload
the gains in adaptation occurs only when training load is greater than normal and becomes progressively increased as improvement in fitness occurs. as the body becomes familiar with a particular of level training stress, it adapts to it and further training at the same level will fail to sufficiently stress the system
progressive overload in endurance programs
the load should be small and adaptations will take place slowly
progressive overload in flexibility training
fastest gains are made in loads that produce small adaptations
progressive overload in strength training
loads need to be less for peak development but adaptations or more significatn
how is progressive overload impactful on aerobic training
it is evident in hearts ability to pump more blood to working muscles (increased cardiac output) and the ability of working muscles to take up more oxygen as it is delivered to cells (increased oxygen uptake)