07/04/2026, 08:49 ch 6,10,12,16 Sophia's flahscrads for the physiology of Exercise exam 4/7
Ch 6,10,12,16 Physiology Of Exercise Exam
4/7 Questions And Answers Latest 2026
Update!!!
the maximum amount of oxygen your body
can use during intense exercise.
What is VO2 max Point at which O2 consumption does not
increase with further increase in intensity
Best single measurement of aerobic fitness
the exercise intensity at which your body
what is lactate threshold starts producing lactate faster than it can
clear it, causing it to build up in your blood.
It determines how fast and long you
can sustain effort
A higher lactate threshold means you
what does lactate threshold determie can:
Run/cycle faster without
fatiguing
Maintain hard effort longer
VO2 max is not best predictor of… endurance performance
VO2 max plateaus after… 8 to 12 weeks of training but can still increase
How much energy (or oxygen) you use to do the
what is economy of effort
same amount of work
O2 required − O2 consumed
• Occurs when anaerobic pathways are used for
what is O2 deficit
ATP
production (from rest to exercise)
why does oxygen deficit happen O2 required (demand) > O2 consumed in early
exercise
At the start of intense exercise, your body can’t
deliver oxygen to the muscles fast enough, so
1
, 07/04/2026, 08:49 ch 6,10,12,16 Sophia's flahscrads for the physiology of Exercise exam 4/7
it relies on anaerobic energy systems (like
glycolysis and ATP-PC).
this is why you produce lactate early in exercise
—it’s anaerobic energy filling the gap.
O2 consumed > O2 required (demand) in early
recovery
What is EPOC After exercise, your breathing stays elevated to
“repay” the oxygen deficit and restore your
body to pre-exercise state.
ATP/PCr stores replenished, lactate to
glycogen, hemo/myoglobin replenished, excess
What physiologically happens during EPOC CO2
cleared
Untrained: L threshold occurs at approx. 50-60%
of
Lactate threshold for trained vs untrained VO2max
Trained: L threshold occurs at approx. 70-80% of
VO2max
higher sustained
Higher lactate threshold = exercise intensity = better endurance
performance
what improves economy of effort PRACTICE
seconds to few mins, Accumulation of inorganic
phosphate (Pi) and other metabolites in the
muscle
1. ATP breakdown releases Pi → binds
with calcium → reduces muscle
Fatigue in short, high-intensity exercise contraction efficiency
2. Hydrogen ions (from anaerobic
glycolysis) can also contribute to
acidosis, affecting enzyme function
Result: Muscle can no longer contract
maximally → fatigue occurs quickly
Fatigue in long-duration exercise more than 90 mins, (endurance sports) Glycogen
depletion
2
Ch 6,10,12,16 Physiology Of Exercise Exam
4/7 Questions And Answers Latest 2026
Update!!!
the maximum amount of oxygen your body
can use during intense exercise.
What is VO2 max Point at which O2 consumption does not
increase with further increase in intensity
Best single measurement of aerobic fitness
the exercise intensity at which your body
what is lactate threshold starts producing lactate faster than it can
clear it, causing it to build up in your blood.
It determines how fast and long you
can sustain effort
A higher lactate threshold means you
what does lactate threshold determie can:
Run/cycle faster without
fatiguing
Maintain hard effort longer
VO2 max is not best predictor of… endurance performance
VO2 max plateaus after… 8 to 12 weeks of training but can still increase
How much energy (or oxygen) you use to do the
what is economy of effort
same amount of work
O2 required − O2 consumed
• Occurs when anaerobic pathways are used for
what is O2 deficit
ATP
production (from rest to exercise)
why does oxygen deficit happen O2 required (demand) > O2 consumed in early
exercise
At the start of intense exercise, your body can’t
deliver oxygen to the muscles fast enough, so
1
, 07/04/2026, 08:49 ch 6,10,12,16 Sophia's flahscrads for the physiology of Exercise exam 4/7
it relies on anaerobic energy systems (like
glycolysis and ATP-PC).
this is why you produce lactate early in exercise
—it’s anaerobic energy filling the gap.
O2 consumed > O2 required (demand) in early
recovery
What is EPOC After exercise, your breathing stays elevated to
“repay” the oxygen deficit and restore your
body to pre-exercise state.
ATP/PCr stores replenished, lactate to
glycogen, hemo/myoglobin replenished, excess
What physiologically happens during EPOC CO2
cleared
Untrained: L threshold occurs at approx. 50-60%
of
Lactate threshold for trained vs untrained VO2max
Trained: L threshold occurs at approx. 70-80% of
VO2max
higher sustained
Higher lactate threshold = exercise intensity = better endurance
performance
what improves economy of effort PRACTICE
seconds to few mins, Accumulation of inorganic
phosphate (Pi) and other metabolites in the
muscle
1. ATP breakdown releases Pi → binds
with calcium → reduces muscle
Fatigue in short, high-intensity exercise contraction efficiency
2. Hydrogen ions (from anaerobic
glycolysis) can also contribute to
acidosis, affecting enzyme function
Result: Muscle can no longer contract
maximally → fatigue occurs quickly
Fatigue in long-duration exercise more than 90 mins, (endurance sports) Glycogen
depletion
2
