The answer is interval training. Interval training is a type of training that involves a series of low-to high-intensity workouts interspersed with rest or relief periods. The high-intensity periods are typically at or close to anaerobic exercise, while the recovery periods involve activity of lower intensity. High interval training can improve fitness and health for everyone and has bigger benefits for older adults.
A will be the answer because usually marking your exercise days will become a habit because lets say you would do a running exercise but you want to do it in a certain day well if you mark it on the calendar, it'll become a habit.
The possible condition that she may be experiencing would be:
Angina Pectoris
<span>This is a medical term for chest pain or the coronary heart disease, it happens when there is not enough blood received in the heart muscle. The symptoms that you would typically experience with Angina would be the pain at the center of the chest or uncomfortable pressure. </span>
A.
The endurance of an athlete is dependent on his or her body's ability to uptake oxygen efficiently, a task carried out by the red blood cells.