As physical fitness improves, the ability to use ______ as a fuel for energy increases.Multiple choice question.proteincarbohydratefat

Fats and carbohydrates are ______ used to meet energy needs.Multiple choice question.primarilyrarelyneveralways

The liver and kidneys must work hard to use protein to meet energy needs because ____.Multiple choice question.proteins require a lot of processing to produce energyproteins are more easily absorbed than carbohydratescarbohydrates are less available than protein as an energy source

Which of the following activities metabolizes the highest percentage of carbohydrate as a fuel source?Multiple ChoiceRunning the 200-meter hurdlesWalking for 1 hourLifting weights for 30 minutesHard cycling for 1 hour

The principles of overload, adaptation, progression, and specificity will improve ______.Multiple choice question.muscular strengthmuscular gainmuscular endurancemuscular power

The consumption of low energy density foods is a successful approach to _______.Multiple choice question.add fat massincrease caloric intakeweight gainweight loss