"NO!" is the answer. Many accomplished women on the international stage serve as role models for coaches. Many coaches, I believe, lose track of the reality that these athletes are throwing a 4 kg tool at their heaviest (in the case of shot and hammer). The women's discus weights only 2.2 pounds! In fact, there are many ways in which men are physically disadvantaged when it comes to discus. The reach is shorter for men, so they need to put more distance between them and the target to get the same result. And since weight is generally held closer to the body for men's events, they are usually thrown from a crouch, which can be tiring over the course of an event. The best way for men to compete with discus is definitely not to try and match the size of the female competitors but instead use their expertise and throw carefully planned discs. Men have won gold medals at the Olympics using this strategy. The answer to your question is yes, you do need to be fairly large to successfully throw a discus. However, this shouldn't be a problem as most men are already quite large. There are also successful women who play a different type of discus - they are called "thumb" throwers and they don't rely as much on mass as regular discus throwers do.