Wiz Khalifa embarked on the rigorous routine of a mixed martial arts workout regimen sometime in the late Spring. The rapper is taking his lifestyle change very seriously as TMZ has captured footage of him training with Fox's Jay Glazer and UFC's Cat Zingano over the last few months. It is reported that Wiz does a full MMA workout for 4 hours out the day.

With his 30th birthday being tomorrow [Sept. 8th], there is a video of the notorious weed smoker in the gym. In the clip, his workout partners uphold the birthday tradition of throwing punches. Two different people take turns hitting Wiz in the stomach as they sing Happy Birthday. It looks like the training is working as Wiz seems to have gained muscle mass and takes the jabs with some easy.