No; of course not! When you play a sport, whether you lose or win does very little compared to how you play and treat others. If you win, and tell another player they did horrible, or bring them down mentally in any way, you are being a poor sport.
The answer would be stress, physical exertion, to much caffeine, ztimulations and more.
The reason as to why that is happening because as they grow older, their system gets weak and how they perceive things gets slow as their senses decline because of their age. This will enable to affect their sensory input, making older people receive less input compared to those who are younger to them.