Athletes who collapse or faint at the finish line often do so because of fatigue. True False

Fatigue during prolonged running is most likely associated with the depletion of;

When marathon runners “hit the wall” around mile 20, ____________________ is the most likely explanation for the sudden onset of fatigue.Group of answer choicesPCr Depletionglycogen depletionPi Accumulation

Why does involvement in regular exercise delay the onset of fatigue?

Muscle fatigue is caused by all of the following except Group of answer choicesaerobic respirationlack of oxygendepleted energy reservesinadequate release of calcium ions

Calcium ion imbalances that occur as ATP levels drop lead to fatigue.