Only if you smoke it.
If you don't believe that then please go do some research from some unbiased medical sites. There are plenty of studies around it.
In fact you have more of chance to develop respiratory and heart disease by smoking weed than you do from cigarettes because its unfiltered.
Your lungs are not made for smoke and it causes health problems no matter how many BS facts you post here. Do you own research and look inside a bong. You cant trust some weed site for facts because they likely just forgot about them. The truth is that weed is not as damaging as alcohol or not as addictive as alcohol or cigarettes but to come on here and flat out lie like its not unhealthy at all is just dumb and does the legalize argument no justice. Please get your facts straight so you can sound intelligent if anyone actually asks your opinion. The argument is not that its healthy, you will lose that one every time. The argument is that is not as bad as things that are already legal and it will bring in tons of revenue that's already going to dealers today.
And if you have ever smoked for years and then quit for a year you would notice your capacity increases almost daily.
Please dude come on.
If it is weed related, I am shocked a college kid would be smoking weed.
Should be legal and most the country is starting to realize this.
While I do agree with this, that doesn't mean that doing so is a good choice for an athlete. These guys need maximum lung function, concentration, and cognitive performance to be at their best. If I'm giving a kid a full ride to be at his best, both on the field and in the classroom, I don't want him making choices that inhibit those things. JMO.
Marijuana doesn't reduce lung capacity.