Exercise Metabolism Flashcards
What happens first when u start running? What are the steps?
ATP stores are activated, then CP system, then Glucose/Glycogen, Kreb Cycle, then ETC, then use of Fatty acid
What are the steps to Exercise Metabolism?
Step 1: ATP stores kick in
Step 2: CP steps in
Step 3: 2 option Glycolysis- aerobic with oxygen and anaerobic with lactate
Step 4: Kreb Cycle and ETC
Step 5: Fatty Acid reduction
What happens when work rate is lower?
It is easier to obtain oxygen and you can skip steps if activity isn’t intense
What is the relationship between VO2 and workrate
more oxygen is consumed with higher work rates
What are the basics of Estimation of Fuel Utilization?
fats need more oxygen
high work = carbs
long period = fats
low work = fats
short period = carbs
What are the energy substrates and when do they kick in
muscle glycogen, blood glucose, Plasma FFA, muscle triglyceride
Plasma FFA dominates low intensity
Muscle glucose dominates at high intensity
What happens at 50% VO2 max when it comes to Fat oxidation?
at that intensity, the highest oxidation of fat rate occurs
Higher VO2 max correlates with what?
higher VO2 max = higher lactate production
What causes lactate accumulation?
low muscle oxygen, accelerated glycolysis, fast-twitch muscles, reduced rate of lactate removal
What is an oxygen deficit?
lack of oxygen and use of anaerobic fuel until satisfactory level of oxygen is achieved
What is EPOC?
excess post exercise oxygen consumption
what contributes to EPOC?
removing lactate and converting to Pyruvate, resynthesis of CP in muscle, restoration of muscle and blood oxygen stores, elevated body temp, post exercise elevation of HR and breathing, spike in epinepherine
How does ATP regenerate PC? And why is it important for a lineman to aerobically fit?
aerobically generated ATP
being aerobically fit means faster ATP regeneration for the CP system
How do you clear out lactate? What is the process of converting pyruvate to glucose called?
liver, turn it into pyruvate –> glucose through
gluconeogenesis, slow twitch muscle fibers are good at using lactate, slow exercise to help remove lactate
