Of course, a number of individual factors can also play a role in whether it's appropriate to exercise while fasting, such as your age, when you last ate, whether or not you're pregnant, taking medications, your medical history, level of fitness, and the type of workout you engage in.
Children should consume no more than 12 grams (92 calories) or 3 teaspoons of added sugar per day, according to the American Heart Association. Teens should consumer no more than 18-37 grams (138-285 calories) or 5 teaspoons of added sugar each day.
They were opened up for public comment through March 31, 2014. The American Heart Association recommends limiting sugar intake to no more than half of your daily discretionary calorie allowance: No more than 100 calories per day for women (about 6 teaspoons) and no more than 150 calories per day for men (9 teaspoons).