Alex is a young man from the US state of California. Six months ago, he weighed（重）92 kg, but now he loses 20 kg. How did he do it?
Alex is from a boxing（拳击）family — his father and two older brothers are boxers. So he started boxing, too. He began with simple exercises, like sit﹣ups and push﹣ups（俯卧撑）. He also started running.
Months later, Alex joined a boxing club in his city. He is always the first man at the club to begin exercising, and the last to leave, with sweat（汗水）on his face. Every day he boxes for about three hours.
"Alex works very hard, " says his coach（教练）, Hector Lopez. "It's surprising to see him lose weight so quickly. I've never met anyone like him in my 20 years of coaching. "
Alex is very happy with his weight now. There is a family photo in his room from 18 months ago. "Each time I look at the photo, I worried about myself. I was so big back then and it was easy for me to have health problems, " Alex says. "I look 100 times thinner and 1, 000 times stronger now. "
