Ok gotta say...if you think Baseball is boring, what about International Football {soccer}. I used to play Soccer growing up and playing it and watching it are two different animals. Baseball can be super boring, if you don't know the game, as well as any sport.
Football may have a bigger following, but has been around really since the late 60's when the AFL/NFL merged. { the American Pro football Association started in 1920}
They trace Baseball back to 1744 or even earlier in some form of the game. Football plays 19 games, if your lucky. Baseball 182. Football starts in September and ends for most, by January {5 Months}. Baseball starts in April and runs into the first few days of October. {7 months}
Basketball needs to raise the rim about 2 feet
Hockey is probably the toughest sport on the body, because of the lack of stoppages. You dont see many fat hockey players. LOL.
This taken from Yahoo ! Answers
The National Athletic Health Institute in Inglewood, California tested several professional motocross racers in September 1979 as part of a comparative study of the cardio-vascular, muscle endurance, and flexibility fitness of athletes from various disciplines. Athletes from track, American football, pro basketball and soccer were tested, among others. As a group, the motocross riders tested to a higher overall fitness level than any group tested. Motocross racers get their heart rate up to around 180 to 190 beats per minute and hold it there for about 35 minutes. These riders do this twice per day (original article appeared in Cycle magazine in early 1980). A subsequent study by the University of Pittsburgh Medical Center's Sports Performance Complex in 2002 reconfirmed the result with more recent motocross racers. The intense physical demand of motocross derives from the fact that the racer of the bike must keep complete control of a 200 lb (91 kg) or heavier bike, while also maintaining their top speed throughout the race.