To be able to engage in a moderate and vigorous physical activity, there is a need for a person to know his/her, heart rate. THR is the desired range
of heart rate reached during,
which enables one's heart and lungs to
receive the most benefit from an exercise or work out. In a planned exercised you
must indicate a specific goal,,
achievable, relevant and,
progress. Also, you must consider the different principles of fitness
training such as principle of overload.​