You are training to run a marathon in six months. which type of muscle fiber would be most beneficial for you to develop? a) slow twitch fibers, because they can contract for long periods of time without fatiguing b) fast twitch fibers, because they contract quickly and powerfully c) fast twitch fibers, because they primarily use aerobic respiration d) slow twitch fibers, because they contain more sarcoplasmic reticulum, allowing fast contractions

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.