There is a good proverb - All work and no play makes Jack a dull boy
Games and sports are not only important for success in studio but it is important for success in every walks of our life. Games and sports include all outdoor and indoor games and also athletics. In ancient Greece they formed the principal part of education. Games are important for the following reason : 
first,games are good exercises and helps in maintaining a good health, and also makes us mentally and physically fit and strong.
secondly, by displaying their feats they can overcome their nervousness.