Task 1
It is clear that some people who participate in exercise training will develop injuries to their bones, muscles, and joints(关节). Despite unfounded reports in the mass media of extremely high injury rates among adult exercisers, there have been few good studies of exercise injuries in populations. One of the difficulties in performing such studies has been the need to identify both the number of cases and the number of people at risk for injury. In other words, it is difficult to know the number of individuals injured and the total number of individuals exercising in the population. But these two figures are necessary in order to calculate(统计) true injury rates. Normally, injury is defined as an accident that causes a person to stop exercising for at leasl one week. The best available studies on injury rates show that about 25 to 30 percent of adult runners become "injured" (based on the above definition) over the course of a year, More serious inj
A. the average number of injuries for each individual
B. the amount of exercises for each individual
C. the numbers of the injured and all individuals in training
D. the numbers of people doing exercises and those stopped exercises for one week
Task 1
It is clear that some people who participate in exercise training will develop injuries to their bones, muscles, and joints(关节). Despite unfounded reports in the mass media of extremely high injury rates among adult exercisers, there have been few good studies of exercise injuries in populations. One of the difficulties in performing such studies has been the need to identify both the number of cases and the number of people at risk for injury. In other words, it is difficult to know the number of individuals injured and the total number of individuals exercising in the population. But these two figures are necessary in order to calculate(统计) true injury rates. Normally, injury is defined as an accident that causes a person to stop exercising for at leasl one week. The best available studies on injury rates show that about 25 to 30 percent of adult runners become "injured" (based on the above definition) over the course of a year, More se
A. the high injury rates for those doing exercises
B. the ways to avoid exercise injuries
C. the evidences for the seriousness of exercise injuries
D. the studies about injury rates and causes for injuries
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