Science Assessment

A group of scientists was interested in finding out how the amount of energy needed to do yoga exercises compared to other forms of exercise. During a typical yoga session, a person moves through a series of poses like the ones shown below.

The scientist recruited 20 people to participate in the study. They first had each person rest for 30 minutes by sitting still in a chair. Then each person moved through a series of standing and sitting yoga poses for 56 minutes. Finally, each person walked on a treadmill at two different speeds (2 miles per hour and 3 miles per hour) for 10 minutes at each speed.

During each part of the study, the scientists determined how much oxygen each person used by calculating the difference between the amount of oxygen inhaled and the amount of oxygen exhaled. The table below presents the average amount of oxygen used during each activity.

What do the relative amounts of oxygen used during yoga and walking at 3 miles per hour tell the scientist about the relative amounts of glucose burned during these activities?

1. There is more glucose burned when walking at 3 miles per hour than when doing yoga.
2. There is more glucose burned when doing yoga than when walking at 3 miles per hour.
3. There are similar amounts of glucose burned when walking at 3 miles per hour and while doing yoga.
4. The relative amounts of oxygen used do not tell the scientists anything about the relative amounts of glucose burned during the activities.