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The step-test was given ______.A．at the beginning and at the end of the 7-week periodB．aft

The step-test was given ______.

A．at the beginning and at the end of the 7-week period

B．after each exercise period

C．only at the beginning of the 7-week period

D．only at the end of the 7-week period

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更多“The step-test was given ______…”相关的问题

第1题

Fifty volunteers were alphabetically divided into two equal groups. Group A is to partic

ipate in a 7-week exercise program and Group B is to avoid planned exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench, at 30 steps a minute for 5 minutes. One minute after completion of the step-test, the pulse rate of each subject (被测试者 ) was taken and recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in Group A rode an Exercycle (机器脚踏车 ) for 15 minutes each day, while Group B remained doing no planned exercises.At the end of the 7 weeks, the step-test was again given to both groups of subjects, and their pulses taken. The post-exercise pulse rates of subjects in the experimental were found to have decreased an average of 30 heart beats per minutes, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.

1).The step-test was given ()

A、after each exercise period

B、at the beginning and at the end of the seven week period

C、only once, at the beginning of the seven week period

D、twice to the men in Group A and once to the men in Group B

2).The post-exercise pulse rates of Group B were found on the average to have ()

A、not changed

B、gone down 28 beats per minute

C、gone down 30 beats per minute？

D、gone down 4 beats per minute

3).How many people were in each group？ ()

A、100

B、50

C、25

D、15

4).What did Group A in their program？ They ()every day.

A、stepped up and down on a bench

B、pushed and pulled on exercise handles

C、rode on an Exercycle

D、refrained from any exercise

5).When was pulse taken？ ()

A、After every exercise period

B、Every day

C、Every time the ratio of active riding was increased

D、After the step-test

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第2题

Fifty volunteers were alphabetically divided into two equal groups. Group A to participate

in a 7-week exercise program, and Group B to avoid deliberate exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench at 30 steps a minute for 5 minutes. One minute after completion of the step-test, a pulse rate of each subject was taken and recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in the experimental group (Group A) rode an exercycle for 15 minutes each day. The exercise schedule called for riders to ride relaxed during the first day's ride, merely holding on to the handle bars and foot pedals as the machine moved. Then, for the next 3 days, they rode relaxed for 50 seconds of each minute, and pushed, pulled, and pedaled actively for 10 seconds of each minute. The ration of active riding was increased every few days, so that by the third week it was haft of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding.

At the end of the 7 weeks, the step-test was again given to both groups of subjects, and their pulses taken. The post exercise pulse rates of subjects in the experimental group were found to have decreased an average of 30 heart beats per minute, with the lowest decrease of 28 and the highest decrease of 46. The pulse rates of subjects in the control group (Group B) remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.

How many people were in each group？

A．100.

B．25.

C．50.

D．15.

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第3题

GI ＞ 70 ，为高GI 食物。

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第4题

高GI食物是指（）

A.GI＞55