i duno bro, im asking this because i box as well, and everytime i smoke some good sativa haze i just rip asss in the ring, i cant feel me getting exhausted, cant feel my body pain, and my reaction time is brilliant, it also opens up many thought chambers for me i start ripping crazy combos, my opinion i duno maybe im just different, i also run alot, and only sleep for 3 hours a day, i guess every 1's just different tho wen it comes to weed