Answer:
Limiting physical conditions that can affect safe driving includes fatigue, illness and deformities
For 1. the answer is The muscular system is responsible for the movement of the human body. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found of the heart, digestive organs, and blood vessels.
The independent variable is the exercise program (high vs low)
The dependent variable is what they are measuring so it would be the subjects stamina. The dependent variable is measured by how long they can walk comfortably on a treadmill (at the end of the program).
