Answer to Question 1
Benefits of Physical Activity
Increased self-confidence
Easier weight control
More energy
Less stress and anxiety
Improved circulation and lung function
Improved sleep
Enhanced immunity
Lowered risk of heart disease
Lowered risk of certain cancers
Stronger bones
Lowered risk of diabetes
Lowered risk of high blood pressure
Increased quality of life
Increased independence in life's later years
Answer to Question 2
Carbohydrate loadinga practice that endurance athletes use to trick their muscles into storing extra glycogenmay not be beneficial for people who exercise less than 90 minutes per workout at a low intensity, although competitive athletes who exercise at a high intensity for more than 90 minutes at a time may benefit from carbohydrate loading. Muscles typically have enough glycogen to fuel 1.5 to 2-hour bouts of activity.
An athlete who follows the glycogen-loading technique in preparation for an upcoming event will first exercise intensely without restricting carbohydrates and then gradually cut back on exercise the week before the competition, rest completely the day before, and eat a very high-carbohydrate diet. Endurance athletes who follow this plan can keep going longer than their competitors without ill effects. In a hot climate, extra glycogen offers an additional advantage. As glycogen breaks down, it releases water, which helps meet the athlete's fluid needs.
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