A tired day

Yesterday I had fitness test that consisted of running 800m, long jump, and so on. The sun light was so strong, that I couldn't focus on my test.

Running the 800m has been my weakness. First I ran so fast that I was quickly out of breath, then I had no more strenght to go the full distance, but I convinced myself to continue to run. At finish line I was too tried that I could hardly stand. 

When I finished the fitness test it was nearly noon.  I felt so tired that I thought it would be better to  go home and crash.

When I got up in the morning, my body was aching all over.

PS. "I" is always capitalized in English and so is the first letter of the first word of every sentence. There is always a space after a coma but none before.

my tiring day

Yesterday, I had fitness tests that contain on running 800m, long jump, and others. The sunlight was so strong that I couldn't focus on my test. Running 800m has been my weakness. I ran so fast that I couldn't catch my breath, and then I had no more strength to finish the full distance. However, I encouraged myself that I can do it at that time. Finally, when I finished it, I was too tired to stand up. 
When I finished the fitness test at around noon, and I was so tired that I thought I should go home and crash.
When I woke up this morning, my body aches all over.

It must have been tiring for you! Congratulations for finishing the run. :)

hope this helps :)