请根据下面的短文内容判断句子，如果正确就填“T”,如果错误就填“F”,如果文中没有提到就填“N”。 One of the easiest ways to keep fit is to do jogging.Jogging is the name for very gentle running—it is just a little faster than walking. Jog 20 meters,then walk 20 meters.Little by little,if you are not feeling very tired,you may do more jogging and less walking.It will be easy for you to start jogging for 15 minutes twice a week,and slowly increase this to 30 minutes every day.The longer you join in jogging,the more you enjoy it and the healthier you will become. If you want to start jogging,you should prepare some comfortable sports clothes and good running shoes.