Question

1. multiple choice 6.66 points

which is a definition of physical activity?
○ movement carried out by the skeletal muscles that requires energy
○ any condition that elevates the heart rate
○ aerobic exercise
○ strength training

Explanation:

To determine the definition of physical activity, we analyze each option:

• Option 1: "movement carried out by the skeletal muscles that requires energy" matches the standard definition of physical activity, as physical activity involves skeletal muscle movement and energy expenditure.
• Option 2: "any condition that elevates the heart rate" is too broad (e.g., stress can elevate heart rate but isn't physical activity) and incorrect.
• Option 3: "aerobic exercise" is a type of physical activity, not the definition of physical activity itself.
• Option 4: "strength training" is also a type of physical activity, not the definition.

Answer:

A. movement carried out by the skeletal muscles that requires energy