You are training for a marathon.As you increase your level of physical fitness,you've noticed that the time spent recovering (breathing heavily after stopping running)is decreasing.What change to your muscle cells might account for this?
A)Increase in actin concentration
B)Increase in muscle size (hypertrophy)
C)Increase in myoglobin concentration
D)Increase in creatine concentration
E)Increase in myosin concentration

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The Answer of You are training for a marathon.As you increase your level of physical fitness,you've noticed that the time spent recovering (breathing heavily after stopping running)is decreasing.What change to your muscle cells might account for this?
A)Increase in actin concentration
B)Increase in muscle size (hypertrophy)
C)Increase in myoglobin concentration
D)Increase in creatine concentration
E)Increase in myosin concentration

You Are Training for a Marathon