Most people【小题1】that regular exercise does wonders for the body and mind — but what exactly are its health benefits? To start with, physical activity increases the【小题2】of your heart and lungs. During exercise, your heart and lungs must work harder. This extra effort makes them grow stronger over the long term. It has also been proven that active people tend to have better immune systems and are at lower【小题3】of diseases. Moreover, exercise is good for your mental health. Working out can help you reduce【小题4】and get over【小题5】feelings. Some studies even show that exercise improves certain brain【小题6】, meaning you could actually exercise your way to better performance at school!

By 【小题1】, in Japan the 【小题2】 between the highest and lowest paid is normally a more modest seven or eight to one. In addition, large Japanese companies have the 【小题3】 of taking care of all their employees, and the 【小题4】 of a “job for life” is still, by and large, true.

In addition to the physical benefits, aerobic exercise has emotional benefits. People who exercise aerobically often say that they feel thirty percent less 【小题5】 than they did before they began exercising. The aerobics 【小题6】 seems to have 【小题7】 people who have not previously been 【小题8】 to get much exercise. You don’t have to join a class or pay money to get aerobic exercise. For example, if you need a few groceries, you can walk to the local supermarket instead of driving, or you can ride a bicycle to school or work instead of taking the bus. You’ll soon 【小题9】 a difference 【小题10】 how you feel.

Sports like American football and ice hockey get most of the attention when it comes to concussions (脑震荡) and other forms of brain injury. But soccer is a(n) 【小题1】 (激烈的) sport for which the head can be as important as the foot.

Heading the ball is a key soccer skill. But a new study finds that players who head the ball frequently are more likely to suffer 【小题2】 (长久的) brain injury and damage their memory than players who are less likely to use their heads.

“For many people, it’s beyond belief that a slight injury could be a problem,” said Dr. Michael Lipton, an expert of neuroradiology (神经放射学) in New York City.

Lipton and his team interviewed 37 adult soccer players from New York City and took high-tech scans (扫描) to 【小题3】 (检查) their brains. They also asked the players how often they played soccer and how often they headed the ball, and they gave the players some neurocognitive tests.

The 【小题4】 (结果) was that the researchers found no link between small amounts of heading and players’ attention, ability to control their   【小题5】 (速度) when they move, or ability to manage complex thinking tasks. However, Lipton warned players not to ignore the possible risks of heading the ball too many times. Players could safely head the ball 885 to 1,550 times a year. It took almost 1,800 times a year for players to have trouble with their memory.