阅读理解。 It's 5:00 in the morning when the alarm (闹钟) rings in my ears. I roll out of bed and walk blindly through the dark into the bathroom. I turn on the light and put on my glasses. The houseis still as I walk downstairs while my husband and three kids sleep peacefully. Usually I go fora long run, but today I choose my favorite exercise DVD,Insanity.Sweat pours down my faceand into my eyes. My heart races as I force my body to finish each movement. As I near theend of the exercise,I feel extremely tired, but a smile is on my face. It's not a smile because the DVD is over, but a smile of success from pushing my body to its extreme limit. Some people enjoy shopping, smoking, food, work, or even chocolate. But I need exercise to get through each day. Some shake heads when they see me run through the town. Others get hurt when I refuse to try just one bite of their grandmother's chocolate cake. They raisetheir eyebrows, surprised by my "no thank you," or by my choice to have a salad. Over the years, I have learned it's okay to just say "no." I shouldn't feel sorry for refusing food that Idon't want to eat. So what drives me to roll out of bed at 5:00 a．m.?What gives me the reason to just sayno to ice cream? Commitment. A commitment to change my life with a way that reduces dailyanxiety,increases selfconfidence and energy,extends life and above all improves my body shape.This is the point where a smile appears on my face as I look at myself in the mirror or try on myfavorite pair of jeans that now fit just right.It's through commitment and sweat that I can make adifference within myself inside and out.