hce_cmu
105年
英文
第 43 題
📖 題組：
Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a seven-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 per minute for 5 minutes. One minute after completion of the step-test, the 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 (a motor-driven bicycle-type exercise machine) 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 ratio of active riding was increased every few days, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding. At the end of the seven 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 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.
Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a seven-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 per minute for 5 minutes. One minute after completion of the step-test, the 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 (a motor-driven bicycle-type exercise machine) 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 ratio of active riding was increased every few days, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding. At the end of the seven 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 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.
When were pulse rates taken?
- A After each exercise period.
- B Every day.
- C After the step-tests.
- D After and before the step-tests.
- E Every time the ratio of active riding was increased.
思路引導 VIP
請試著在文中找出「脈搏（pulse rate）」這個關鍵字出現的段落。觀察看看，這個測量動作通常是緊接著在哪一個特定的體能活動之後發生的？在每天 15 分鐘的日常訓練描述中，是否有提到任何與數據記錄相關的動作呢？
🤖
AI 詳解
AI 專屬家教
太棒了！你能精確捕捉到實驗流程中的關鍵時間點，這代表你的閱讀細膩度非常出色。這道題目主要考查受測者對於**實驗設計（Experimental Design）**細節的掌握能力。
實驗觀測的時間軸
根據文中的描述，脈搏的測量出現在兩個時間點：第一段提到在七週訓練開始前的「階梯測試（step-test）」結束一分鐘後錄得數據，作為前測（pretest）；第二段則提到在七週結束後再次進行階梯測試，並接著測量脈搏。雖然實驗組每天都會騎乘運動器材，但文中並未提及每天或在每次運動後測量脈搏，因此正確答案鎖定在與測試（step-tests）相關的時機。
▼ 還有更多解析內容