July 5th

We did not have class yesterday due to the 4th of July. So I was eager to jump into water.
We were taught how to tread water, which in Chinese is 踩水. Back in China, to obtain promise to swim in deep water, we have to pass an exam. The exam is swimming 200m in any style and then, without rest, treading water for 2 minutes and keep your breast out of water. I managed to pass the exam 10 years ago. But I feel I am not as good as I used to since I feel tired even without swimming 200m and no requirement of breast out. Less of other exercise cause me lose my endurance. I am trying to rebuild it.
After practicing of treading water, I went to swim and measure my time. The results are: free style 2 minutes 3 seconds, breaststroke 2 minutes 19 second. My goal is to improve my free style to 1 minute 45 seconds. and breaststroke to 2 minutes.