Your body’s conditioning will help you improve your discus throwing performance. Lower body power movements are important, but you need to develop your upper body explosive power as well.
The video below shows a few explosive exercises that you can do at the gym. These should help you improve your upper body explosiveness specifically for the discus throw.
Also check the discus training equipment available to help you improve your performance.
If you would like to improve your discus throw, check out the training programs from Championship Productions.