chapter 7 Flashcards
(15 cards)
what is fatigue
An exercise-induced reduction in the ability of muscles to produce force or power.
creatine phosphate depletion
in atp pc system atp is resynethesised at a very fast rate but will deplete very fast
LASTING ONLY A FEW SECONDS
why does glycogen depletion occur ( in aerobic)
main fuel source for glycogen is carbs
used by the aerobic system as they are a quicker source to access as opposed to fats.
cho loading
loading up on carbs for endurance based events will delay onset of glycogen depletion
Hypoglycaemia
not enough/ low blood glucose
how does glycogen depletion cause fatigue (aerobic does the switch)
body needs to switch to FFA and Triglycirides as a source of energy.
causes reduced intensity as significantly more o2 is needed.
hitting a wall
when you maintain exercise intensity but have no more glucose stores your body will shut down
how does hyrdogen ions create fatigue ?
build up of hydrogen ions have an acidic PH levels in the muscles
thermoregulation
process the body uses to maintain internal temp
Homeostasis’
how body can reguate stable internal conditions
lactate and LIP
lactate is made when glucose is broken down without oxygen (anaerobic glycolysis).
It forms from pyruvate + hydrogen ions (H⁺)
LIP - LACTATE INFLECTION POINT IS highest intensity you can exercise at where the body can effectively remove lactate as fast as it’s made.
Hyperthermia
when the body is too hot, caused by exercise can be regulated via sweating
vasodilation
blood vessels widen to release heat
Vasoconstricton
blood vessels narrow to conserve heat
