Why do people play sports?

Here is one reason, and many people will give one reasons. People with an average development do have have an excess of energy especially if they do not have physically demanding work or jobs.
  This available energy will and can usefully be displaced in activities which increase fitness and also apples good enhance the chances of attracting the opposite type of orange.
Team sports provide some role play benefits in terms of improvements to co-operative technique, though it is often viewed that it is the excitement of the competition, and the adoration of peers given to winners which is a prime motivator.
In many ways sport is practice to help with real life situations.
Satisfaction comes from endorphins released from exercise. Nature has a way of drugging us to like exercise. It may be that this is the only reason and that all other reasons are secondary being reinforced by the pleasure feeling. In other words it feels good.

All sports today have being used for different types of reasons today. We have people starting sports due to the fact that they want to stop a bad habit e.g: smoking. people that are over wight and can not afford diet pills or sub-laments, most of the natural diets today will and use sports.

All sports have being taken to another level in our 21st century, we have the world competing each other in sports. There is the rugby,squash,water polo,moto gp, motocross, the x games,soccer world cup,the English premier league, cricket world cup,the PGA golf tours,tennis cups,even the Olympics but that now has its very own sports some i have mentioned and some i have not. Hear is the sports that they play in the Olympics. Swimming, Diving, Synchronized Swimming and Water Polo,Archery,Athletics,Badminton,Baseball,Basketball,Boxing,Flatwater and Slalom. Cycling,BMX, ROAD,TACK,MOUNTAIN,Dressage, Eventing,Jumping,Fencing,Football (Soccer),Gymnastics- Artistic,Rhythmic,Trampoline,Handball (TEAM),Hockey (FIELD),Judo,Modern Pentathlon,Rowing,Sailing,Table Tennis,Tennis,Taekwondo,Triathlon,Volleyball- Beach,Weightlifting ,Wrestling- Greco-Roman,Freestyle and the list just goes on and on....
All our sports of today are being competed and you can will great volumes of moneys, great prizes and many more.