Why do you give a pregnant patient 4-6 glasses of water before an Ultrasound? 

Because ultrasound travels through water.

Explanation:

This is not common practice in ERs and I would not recommend giving a PT anything PO unless safe to do so.

That being said, I'm sure whoever asked you this question wants you to infer that Ultrasound equipment uses sound wave resonance to visualize what is occurring through barriers. This is why they use the gel with the probe so as to allow better transfer of the sound waves.

take a nice, long walk. walk, feel the wind through your hair and your it is very relaxing.

no, because those are both different running competitions. while distance runners train their legs and their lungs to run long amounts of time, the sprinters are training their legs and their lungs to give all they have in the little amount of area they need to cover. the brain also plays a huge part in all of this.

the brain is the only thing in your body that sends messages to your body telling you to run. if you are a long distance runner and you have the mind set of a sprinter, you will not get anywhere. if you have a long distance mind set and you have to run 200m in 20 seconds then you will not make it in time.