Injuries are one thing, but how you respond to them is another. Do you take the appropriate time off of the activity to heal? A lot of people who are addicted to physical activity flat out refuse to stop despite being told by a doctor that they need to take weeks/months off to heal up. That's where it becomes an unhealthy mindset...when you can't stop despite it being clear to everyone other than you, that you should. I wonder where he is getting that number. That's quite a bit of Cannnabis. I can feel residual fogginess during the day, from vaporizing the night before, and that's only ~0.5g. I consider that a side effect. Not a terrible one, but one nonetheless. Also, 2g of bud is a very rough measurement, because you can get 10% or 25% THC bud, and the dose would be vastly different. If your doctor concerned about THC? CBD?