International sport science congress without a doubt would have to be the national festival. = International Sport Science Congress is the national festival I choose to discuss.
This festival has held in the certain university every year around in august in Korea. = This festival is held in certain universities every year around August in Korea. This festival involves a variety of academic symposium, reception and parties among people who are majoring in Physical activities and sports throughout the world.
There are a number of reasons this congress has held. = There are a number of reasons this congress is held. Firstly, a lot of researchers and professors have a chance to interact with each other enjoying party to celebrate their priceless meeting. Secondly, they have a discussion related to latest research findings which is conducted all over the world. Especially, there is beneficial information relevant to people’s healthy lifestyle. = Most impontly there share beneficial information relevant to people’s healthy lifestyle.  I also have attended this festival to acquire the up-to-date academic trends to stay fit as well as get along with foreigners.
Particularly, there are various delicious foods which are exotic and mouth-watering at the night reception.
There are a couple of reasons why I think this festival is important for me.
Learning how to stay healthy in this festival was not only worthwhile information but a quality time for me as well. Nowadays adult diseases such as diabetes, obesity, and heart disease are on the increase. So it was important news for me how to stay fit. = So learning how to stay fit is very important to me. As the useful information offered by the festival, my lifestyle could become better.  = Becasue of the useful information offered by the festival, my lifestyle have become better. Thus, spending more time on outdoor activities and eating a lot of fruit and vegetables would be seen easily in my life = (You already said this earlier.)