week 9 training Flashcards
what 2 things from diet effect fatigue and performance
cho and hydration
what cns functions effects performance
arousal and motivation
what strength and skill effect performance
practice, natural environment , body type and fibre types
how does environment effect performance
altitude, heat and humidity
what anaerobic factors effect performance
PC, glycolysis
what aerobic factors effect performance
vo2 max, Q, o2 delivery, o2 extraction and mitochon.
what do the factors depend on
the performance itself
what is fatigue
inability to maintain power output or force repeated muscle contraction s which is reversible with rest
what is central fatigue
cns -
what is peripheral fatigue
neural, mechanical and energetics of contraction factors
2 factors of centeral fatigue
reductions in motor units activated and firing frequency
cns arousal can alter the state of fatigue by facilitating
motor unit recruitment and increasing motivation , or physical and or mental diversion
excessive overtraining can cause
reduced performance and prolonged fatigue as well as brain serotonin to dopamine ratio activity
fatigue is a conscious process and exercise will persist if
The motivation is greater than perceived exertion
neuromuscular junction is a place for fatigue yes or no
no
where is the site for fatigue
sarcolemma and transverse tubules
explain the basic concept of fatigue
the inability of na and k to maintain action potential amplitude and frequency
what can be imporved by training
na + k levels persistent during fatigue within the exercise
how does exercise help wrork through fatigue
block t tubules and reduced calcium release
peripheral fatigue mechanical factors depends on what 3 things
arrangement of myosin and actin, ca2 binding to troponin and atp availability
high amounts of what contribute to fatigue
H+
How does hydrogen contribute to fatigue
reduce force across bridges and inhibit ca2 release from SR and less force at ca2 concentration
phosphate accum, inhibiting maximal force, reduced cross bridge binding to actin and ca2 release from sr is effected from what
atp imbalance for fatigue and atp requirements and atp generating capacity
peripheral fatigue means that
the rate of atp utilization is slowed faster than rate of atp generation
what is radicles
molecules with an unpaired outer orbital electron
exercise promotes muscle ….
muscle free radicle production
radicle production contributes towards
fatigue due to damage to proteins and lipids
radicles effect the what pump
sodium and potassium , due to disruption of k homeostasis
antioxidant supplements do not stop
fatigue
ultra short events is what duration
10 seconds under
ultra short events uses what muscle fibre types
2
what 3 things are important for ultra short duration events
motivation , arousal and skill
what is the primary energy for ultra short event
anaerobic glycolysis
anaerobic glycolysis causes an increase in what
hydrogen and lactate
h+ and lactate causes an increase in what
ca2 interference of binding with troponin and atp production
how long is moderate duration exercise
3-20 min
what percent of atp is generated aerobically at 3 min
60%
what percent of atp is supplied aerobically at 20min
90%
a high vo2 max is good for who
moderate distance
what does a high vo2 max show
high stroke volume and arterial o2 as well as haem and o2 inspiration
which muscle fibres are recruited
2x / 2a
how long is intermediate events
21-60 min
where does h+ come from
high levels of energy expenditure near vo2 max
what threshold of vo2 max is intermediate
upper 90% vo2 max
factors effecting intermediate
hydration, heat, lactate, environmental factors
what is the duration of long events
1-4 hours
factors that will impact long events
environment more than inter. Cho levels and hydration levels , electrolytes and diet
why should endurance athletes adjust cho levels
muscle and liver glycogen decline and maintain cho oxidation
is maximal o2 uptake important in endurance
yes - needing a strong vo2max of 80ml kg at 80% vo2 max
FACTORS EFFECTING ULTRA ENDURANCE
Limited endurance, metabolic response, hyponatremia, other factors
