The target heart rate zone is 60-80%
<span>How long participants practice a task can also be modified to help optimize skill development. Some individuals might need additional sessions to achieve a desired physical activity outcome, whereas others might attain personal goals in fewer sessions. </span>
The answer is letter A.
Biking or bicycling is a form aerobic exercise that develops cardiorespiratory fitness. This is because the heart and lungs are the important organs that function when this activity is being done. Biking for 30 minutes to more than a few hours will inhibit the strengthening of the muscles of the heart and the ability of the lungs to convert unoxygenated blood into oxygenated blood. If you engage in this activity on a regular basis, you will notice and improvement in your performance.
Answer:
Polycythemia vera
Explanation:
A absolute increase in total red blood cell mass is characterized by primary polycythemia, or polycythemia vera. Treatment aim is to reduce the viscosity of the blood. That can be done by removing blood by periodic phlebotomy to reduce the volume of red blood cells. Transfusions are used to treat sickle cells and beta-thalassemias. Megaloblastic anemias, caused by deficiencies in vitamin B12 and folic acid, are treated by replacing those nutrients.