Now we can't imagine our life without sport. Sport is all usually forms of competitive physical activity or games. People do sports because they want to live longer and better, also they want to keep themselves fit and be healthier. I think it's the best way to spend your free time and to have a rest. But there are many kinds of sport that are dangerous such as base jumping, cave diving, bull riding. You can hurt youself that is why you must always be careful!
In conclusion I would like to say that sport can be helpful and can be harmful, but in general it's very fun.