swimming
most people reckon that swimming is the best sport in the Olympics
It depends on what you define the most common sport in the Olympics as, football is probably the most played sport that is included in the Olympics
the most exiting sport is football because most people watch it
Generally football, as its the only sport that is always on TV. If there is anything exiting on like Golf Open or Olympics kids will watch that.
Hurtles because sally Pearson did
The main sport in Romania is gymnastics. It isn't as popular there anymore though. It is important to distinguish between the sport that is most popular and the sport at which a nation has done well in the Olympics. For sure, Romania has done well at the Olympics in Gymnastics but that does not mean it is the most popular sport. Generally the most popular sport in any European country is Football (Soccer) because it is the sport played by most people who participate in sport.
Gymnastics
soccer
Olympics
Hockey!
Wrestling
swimming