Exercise. Get fit. Watch your weight. We see these messages all around us in magazines and newspapers, but how do you choose the right activity?

  There are three main goals for fitness. First, strengthening the heart and lungs. Second, strengthening the muscles. Third, controlling body weight. Not all activities will meet each goal. You may center on one goal or, for total fitness, all three.

Running

  No other exercise will help you lose weight faster than running. It also strengthens your heart, lungs, and leg muscles. But it can hurt your joints. If you feel pain in your knees, you need to stop and choose a different activity.

Walking

  This activity puts less stress on the body than running. But to see results you need to get your heart beating faster. This means you’ll need to walk fast.

Swimming

  Swimming is a great way to strengthen different pasts of your body. But if weight loss is your goal, you may want to pass on the pool. The water in a swimming pool is cooler than our body temperature. The body naturally protects itself from the cold by keeping fat.

Cycling

  Riding a bicycle will help you lose weight and work your leg muscles. But be careful! If you live in the city, stay on bike path, away from traffic. Or you can ride indoors on a stationary bike.

Weight lifting

  We often hear of elderly people falling and hurting themselves. They just don’t have the strength to catch themselves. Lifting weights can prevent that. It also helps prevent injury form other activities. The drawback to weight lifting is that you’ll need to pay for a membership at a gym.

68. Running can help you a lot, but it can’t ______.

     A. strengthen your heart and lungs

     B. strengthen leg muscles

     C. control body weight

     D. prevent pains in your joints

69. You can choose any activity below to lose your weight except ______.

      A. running                 B. walking          C. swimming             D. cycling

70. Which of the following statements is not mentioned in the text?

     A. Running is the fastest way of loosing weight.

     B. You need to walk fast in order to build up your strength.

     C. Cycling is the perfect way to get total fitness.

      D. You need to pay for a membership at a gym if you want to exercise weight lifting.

What do we know about sport physiology(生理学)?

☆Rowing: The perfect male rower is tall, heavy but with very low body fat, broad shoulders and long, powerful limbs. His heart can pump 40 liters of blood a minute.

☆Shooting: Perfect shooters have a low heart rate. Within seconds of firing, they can drop their heart rate by 20 beats and fire exactly between heartbeats. Pistol shooting also needs strong upper body muscles.

☆Swimming: The perfect swimmer is tall, with very long limbs, particularly arms. Top-class swimmers have big feet. They have big hands to act as paddles, narrow hips to reduce drag and broad shoulders for arm power.

☆Sprinting: The perfect 100m sprinter is tall, with a unified body shape. Top sprinters have slim lower legs and relatively narrow hips.

☆Gymnasts: The perfect female gymnast is small and slim, with a high strength to weight ratio and even muscles. She has a narrow body for superb balance and a high power, high capacity energy system.

☆Weightlifting: The perfect weight-lifter has a strong unified body type, and is well muscled. Good weightlifters are not tall and tend to have relatively short arms and legs. They have cardiovascular sys-tems that can stand sudden blood pressure increases.

☆Marathon running: The perfect marathon runner has a light frame, slim legs and is of small to medium height. They have a very high oxygen uptake.

60. Which of the following needs strong upper body muscles?

A. Walking. B. Shooting.C. Sprinting. D. Marathon running.

61. Which of the following pictures is mentioned in the passage?

62. Which of the following statements is NOT true according to the passage?

A. The perfect male rower's heart can pump 40 liters of blood a minute.

B. Top-class swimmers have big feet, big hands to act as paddles and narrow hips.

C. The perfect 100m sprinter is tall, with a weak body and has short legs.

D. The perfect female gymnast is small and slim, with a high strength and muscles.

63. The text is mainly about ________ .

A. sport events B. sport rules C. sport games D. sport physiology