No its not Its neither dangerous or a sport. (unless you race)
Suggest you look up sport and dangerous on wiki/dictionary.com/OED then.
from dictionary.com
Sport:
1. an athletic activity requiring skill or physical prowess and often of a competitive nature, as racing, baseball, tennis, golf, bowling, wrestling, boxing, hunting, fishing, etc.
2. a particular form of this, especially in the out of doors.
3. diversion; recreation; pleasant pastime.
4. jest; fun; mirth; pleasantry: What he said in sport was taken seriously.
5. mockery; ridicule; derision: They made sport of him.
1) tick, often competative, but doesn’t have to be
2) not much indoor mtb, tick
3) tick, even in the rain covered in midges its pleasent, and wadeing through an environmentlay sensitive scottish bog certainly passes a lot of time
4) STW.
Dangerous:
1. full of danger or risk; causing danger; perilous; risky; hazardous; unsafe.
2. able or likely to cause physical injury: a dangerous criminal.
1) errrr, see thred title
2) eg. a dangerous sport.