Cardiovascular fitness is the ability of the heart, lungs and circulatory system to supply oxygen and nutrients
to working muscles efficiently, and allows activities that involve large muscle groups (walking, running,
swimming, biking, etc) to be performed over long periods of time.
1 mile test: Client runs on treadmill until 1 mile (or 1.6km) is completed. Client is in control of speed and
can increase or decrease the speed whenever they need until total distance is completed.