Energy Systems Flashcards
ATP
-adenosine triphosphate
-1st energy source
-fuels contractions
-stored in muscle in limited amounts
-used up 2-3sec in muscle
skeletal muscle synthesizes…
-phosphocreatin
-muscle glycogen
-intramuscular triglycerides
macro nutrients and energy
carbo 4.1cal/g
protein 4.3 cal/g
fat 9.3 cal/g
most important macro nutrient for energy
carbs
carbs breakdown and storage
-breaks down to glucose
-glucose stored in liver and muscle as glycogen
-liver can store 100g of glucose
-muscle stores 500g of glucose
lipogenesis
-limited storage for carbs so more than the limit with be converted and stored as fat
ATP +h20
splits in 3 phosphate groups and energy
-contracts muscle
-ADP
3 metabolic pathways
ATP-PCr pathway
glycolytic pathway
aerobic pathway
ATP-PCr pathway
-after ATP is used up, phosphocreatine is used
-stored in muscle
-3-5x more than stored ATP
Where do you get PCr from
meat, liver and kidneys
ATP-PCr pathway for sports
good for power events, shotput, high jump
-used in first 10-15 sec
-recovery 2-5 min
work:rest= 1:10-12
Why is ATP the best source
-no long series of reactions
-doesn’t depends on o2 transporting to work muscles
-stored in muscle
glycolytic pathway
using blood glucose + stored glycogen
-anaerobic
-increasing acidic b/c H+ in muclse
-produces lactate by pyruvate + h+
glycolytic pathway for sports
15-90 sec
-recovery 30-60 min active/ 1-2h rest
1:6sec
-200,400 and 800m sprint
LT
lactate threshold
a point during exhaustive where lactate builds up in the bloodstream faster than the body can remove it
