Deep inside muscle cells, tiny little proteins continually move during aerobic exercise requiring energy to sustain movement. This energy mainly comes from all of the following except: carbohydrates

oxygen

proteins

fats

Evaluate the scenarios and select the one that demonstrates the training principle overload. kai swims faster and faster every day. katie stays consistent in her routine. maggie does kickboxing daily so she can win a kickboxing match. sarah usually likes to run, but tries swimming. !